# headgroup

> English word · Noun

## Definitions
1. A bulky part of a molecule, often containing one or more functional groups, attached to a relatively long aliphatic tail or backbone
2. The group of instances at the head (high end) of a distribution curve

## Etymology
From head + group.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/headgroup