Definition

Noun: A saturated fatty acid with the chemical formula C₁₇H₃₅COOH. It is a solid, waxy substance at room temperature and is a common component of natural fats and oils.

Usage

This is a technical, scientific term used primarily in chemistry, biochemistry, and food science contexts. It refers to the specific chemical compound itself. * Octadecanoic acid is a major component of animal fats like beef tallow. * The study measured the concentration of octadecanoic acid in various vegetable oils.

Advanced Usage

• In industrial contexts, salts or esters of octadecanoic acid are common. For example, sodium octadecanoate is a type of soap.
• The term is often used in nutritional analysis to specify the saturated fat content of foods.

Variants and Related Words

• Stearic acid: This is the most common and practical name for octadecanoic acid. The two terms are synonyms in most contexts.
• Saturated fatty acid: This is the broader category to which octadecanoic acid belongs.
• Glyceride: A compound formed from glycerol and fatty acids, such as tristearin (the triglyceride of octadecanoic acid).

Synonyms

• Stearic acid (the common name)

Different Meanings

This term has only one specific meaning: it refers exclusively to the chemical compound with the formula C₁₇H₃₅COOH. There are no idiomatic or figurative uses.

Noun

1. a waxy saturated fatty acid; occurs widely as a glyceride in animal and vegetable fats