CMSN(C)® study materials
CMSN(C)® study resources

CMSN(C)® key terms

CMSN(C)® · Get comfortable with the vocabulary.

Nutrition Diagnosis

A formal statement naming a specific nutrition problem that a dietitian is responsible for treating, written in PES format with problem, etiology, and signs or symptoms.

Related: PES Statement, Nutrition Assessment, Nutrition Monitoring and Evaluation
PES Statement

A structured sentence linking a nutrition problem (P), its contributing cause (E), and the evidence that proves it (S), guiding the choice of intervention.

Related: Nutrition Diagnosis, Nutrition Intervention
Nutrition Assessment

The systematic gathering and interpretation of food, medical, anthropometric, biochemical, and client-history data used to identify nutrition problems and set the stage for diagnosis.

Related: Nutrition Diagnosis, Anthropometric Measurement, 24-Hour Recall
Nutrition Monitoring and Evaluation

The ongoing review of specific indicators chosen during intervention to determine whether goals are being met and whether the nutrition care plan needs revision.

Related: Nutrition Intervention, Nutrition Diagnosis
Nutrition Intervention

The planned actions, such as diet modification, education, or feeding support, selected to resolve or improve an identified nutrition diagnosis.

Related: Nutrition Diagnosis, Nutrition Monitoring and Evaluation, Medical Nutrition Therapy
Medical Nutrition Therapy

Individualized nutrition treatment provided by a qualified practitioner, including assessment, counseling, and therapeutic diets, to manage a disease or condition.

Related: Nutrition Intervention, Therapeutic Diet
Anthropometric Measurement

Objective body-size data such as height, weight, body mass index, waist circumference, and skinfold thickness used to track growth and nutritional status.

Related: Body Mass Index, Nutrition Assessment
Body Mass Index

A weight-to-height ratio (kilograms divided by meters squared) used to classify underweight, normal weight, overweight, and obesity in adults.

Related: Anthropometric Measurement, Obesity
24-Hour Recall

A dietary assessment method in which a client reports everything eaten and drunk during the previous day, valued for speed but limited by memory and day-to-day variation.

Related: Food Frequency Questionnaire, Nutrition Assessment
Food Frequency Questionnaire

A checklist asking how often a person eats listed foods over a set period, useful for ranking usual intake patterns rather than measuring precise amounts.

Related: 24-Hour Recall, Nutrition Assessment
Macronutrient

A nutrient needed in large amounts to supply energy and building material: carbohydrate, protein, and fat, each contributing a known number of kilocalories per gram.

Related: Micronutrient, Energy Balance
Micronutrient

A vitamin or mineral required in small quantities for growth, metabolism, and regulation of body processes, without providing energy itself.

Related: Macronutrient, Bioavailability
Bioavailability

The proportion of a nutrient consumed that is absorbed and used by the body, influenced by food form, other meal components, and individual physiology.

Related: Micronutrient, Nutrient Density
Nutrient Density

The amount of a nutrient supplied per unit of energy in a food, used to judge how nutritious a food is relative to its calorie content.

Related: Energy Density, Bioavailability
Energy Density

The kilocalories contained in a given weight or volume of food, with high-density foods promoting greater intake and low-density foods supporting satiety per calorie.

Related: Nutrient Density, Energy Balance
Energy Balance

The relationship between energy consumed from food and energy expended through metabolism and activity; a sustained surplus adds weight and a deficit reduces it.

Related: Basal Metabolic Rate, Energy Density
Basal Metabolic Rate

The energy a resting body uses for essential functions such as breathing and circulation, making up the largest share of most people's daily expenditure.

Related: Energy Balance, Indirect Calorimetry
Indirect Calorimetry

A method that estimates energy expenditure by measuring oxygen consumed and carbon dioxide produced, often used to set calorie goals for critically ill patients.

Related: Basal Metabolic Rate, Enteral Nutrition
Enteral Nutrition

Delivery of liquid formula directly into the gastrointestinal tract through a tube, used when oral intake is inadequate but the gut still works.

Related: Parenteral Nutrition, Aspiration Risk, Indirect Calorimetry
Parenteral Nutrition

Provision of nutrients intravenously, bypassing the digestive tract, for patients who cannot absorb or tolerate enteral feeding.

Related: Enteral Nutrition, Refeeding Syndrome
Refeeding Syndrome

A dangerous shift of electrolytes, especially phosphate, potassium, and magnesium, after nutrition is restarted in a malnourished person, requiring slow, monitored feeding.

Related: Parenteral Nutrition, Enteral Nutrition
Aspiration Risk

The chance that food, fluid, or tube formula enters the airway, a concern with swallowing disorders or tube feeding that guides texture and positioning choices.

Related: Enteral Nutrition, Dysphagia
Dysphagia

Difficulty swallowing that can lead to choking, aspiration, or inadequate intake, often managed with texture-modified diets and thickened liquids.

Related: Aspiration Risk, Therapeutic Diet
Therapeutic Diet

A planned eating pattern modified in energy, nutrients, texture, or consistency to treat a specific medical condition such as diabetes, kidney disease, or hypertension.

Related: Medical Nutrition Therapy, Dysphagia, Renal Diet
Renal Diet

An eating plan that adjusts protein, sodium, potassium, phosphorus, and fluid to match kidney function and dialysis status while preventing nutrient imbalances.

Related: Therapeutic Diet, Micronutrient
Glycemic Index

A ranking of carbohydrate-containing foods by how quickly they raise blood glucose compared with a reference food, used to guide diabetes meal planning.

Related: Carbohydrate Counting, Therapeutic Diet
Carbohydrate Counting

A diabetes self-management method in which a person tracks grams of carbohydrate eaten and matches insulin or portions to control blood glucose.

Related: Glycemic Index, Motivational Interviewing
Obesity

Excess body fat that impairs health, commonly classified in adults by body mass index thresholds and addressed through diet, activity, behavioral, and medical approaches.

Related: Body Mass Index, Motivational Interviewing
Motivational Interviewing

A collaborative counseling style that draws out a client's own reasons for change through open questions, reflective listening, and affirmation rather than advice-giving.

Related: Stages of Change, Self-Efficacy
Stages of Change

A behavior-change model describing readiness as progressing through precontemplation, contemplation, preparation, action, and maintenance, with relapse possible at any point.

Related: Motivational Interviewing, Self-Efficacy
Self-Efficacy

A person's belief in their ability to carry out a specific behavior successfully, a strong predictor of whether nutrition goals are attempted and sustained.

Related: Stages of Change, Motivational Interviewing
Health Literacy

The capacity to obtain, understand, and act on health information, which shapes how nutrition education should be written, spoken, and paced for each client.

Related: Motivational Interviewing, Nutrition Counseling
Nutrition Counseling

A structured, supportive conversation in which a practitioner helps a client set goals, build skills, and solve problems related to food and health.

Related: Health Literacy, Motivational Interviewing
Hazard Analysis and Critical Control Point

A food-safety system that identifies where contamination could occur, sets control points, and monitors limits to prevent illness before it happens.

Related: Temperature Danger Zone, Cross-Contamination
Temperature Danger Zone

The range of roughly 40 to 140 degrees Fahrenheit in which bacteria multiply fastest, so perishable food must be kept out of it during storage and service.

Related: Hazard Analysis and Critical Control Point, Cross-Contamination
Cross-Contamination

Transfer of harmful microorganisms or allergens from one food, surface, or utensil to another, prevented by separation, cleaning, and proper storage order.

Related: Hazard Analysis and Critical Control Point, Temperature Danger Zone
Standardized Recipe

A written formula listing exact ingredient amounts, yields, portion sizes, and procedures so that a dish turns out the same every time and costs can be calculated.

Related: Portion Control, Food Cost Percentage
Portion Control

Serving consistent, measured amounts of food according to a standard, which controls cost, supports nutrition goals, and reduces waste.

Related: Standardized Recipe
Scope of Practice

The boundaries of what a practitioner is trained, licensed, and legally permitted to do, which determine when to refer a client to another professional.

Related: Code of Ethics, Standards of Practice
Code of Ethics

A profession's formal statement of core principles such as competence, integrity, and confidentiality that guide conduct and accountability in daily practice.

Related: Scope of Practice, Standards of Practice