headgroup

== English == === Alternative forms === head group === Etymology === From head +‎ group. === Noun === headgroup (plural headgroups) (organic chemistry) A bulky part of a molecule, often containing one or more functional groups, attached to a relatively long aliphatic tail or backbone (mathematics) The group of instances at the head (high end) of a distribution curve ==== Related terms ==== tailgroup === Anagrams === durophage