kilocalorie
/'kilou,kæləri/
Học thuậtThân thiện
Definition
- Noun:
- A unit of energy: A kilocalorie is a unit of heat equal to the amount of energy required to raise the temperature of one kilogram of water by one degree Celsius at one atmosphere of pressure. It is commonly used in nutrition to quantify the energy-producing potential of food.
Usage Examples
- Noun:
- One gram of fat provides approximately nine kilocalories of energy.
- Nutrition labels often list the energy content of food in kilocalories, though they are frequently referred to simply as "calories."
- The dietitian calculated that his daily intake was 2,500 kilocalories.
Advanced Usage
- "Dietary kilocalorie": Often used in nutritional science to specify the food energy unit, distinguishing it from the smaller "calorie" (small calorie) used in physics and chemistry.
- The term "Calorie" (with a capital C) on food packaging is technically a dietary kilocalorie.
Variants and Related Words
- Calorie (capital C): In a nutritional context, "Calorie" is synonymous with kilocalorie.
- This snack bar contains 100 Calories (kilocalories).
- kcal: The standard abbreviation for kilocalorie.
- The energy density is 4 kcal per gram for protein.
Synonyms
- Large calorie: Another term for kilocalorie, used to distinguish it from the small calorie.
- Food calorie: A common informal synonym used in dietary contexts.
Notes on Meaning
- In everyday language, especially regarding food and diet, the word "calorie" is almost always used to mean "kilocalorie." The kilocalorie is the standard unit for measuring the metabolizable energy in food that the body can use.
Noun
- a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure; used by nutritionists to characterize the energy-producing potential in food