triglyceride
Meaning
an ester formed from glycerol and three fatty acid molecules, which is the main constituent of natural fats and oils.
a lipid molecule of this type, especially when circulating in the blood as a potential risk factor for cardiovascular disease.
Structure
Usage
a high level of triglyceride in the blood is often associated with an increased risk of heart disease.
dietary fats are broken down into triglycerides for storage in adipose tissue.
the lab report showed her triglycerides were within the normal range.
Etymology
The word triglyceride is a modern chemical term constructed from classical elements. The prefix 'tri-' directly denotes the molecule's structure, which involves three fatty acid chains. The core 'glycer' originates from the Greek word for 'sweet', reflecting the sweet taste of glycerol, the alcohol backbone to which the acids attach. The suffix '-ide', commonly used in chemical nomenclature, signals its identity as a specific type of ester compound. Thus, the term's literal logic—"a sweet-based compound with three parts"—precisely maps onto its scientific definition: an ester derived from one glycerol molecule and three fatty acids.
Analysis
- tri: from greek and latin 'tri-', meaning 'three'. a numerical prefix indicating quantity. - glycer: from french 'glycérine', from greek 'glukeros' (γλυκερός), meaning 'sweet', referring to glycerol's sweet taste. - ide: a suffix used in chemistry to denote a binary compound or, in organic chemistry, certain classes like esters (e.g., glycoside, peptide).