I. | ̷ ̷ ̷ ̷|prēˌnȯid adjective
Etymology: isoprene + -oid
: relating to, containing, or being the branched-chain grouping (C) 2 C−C−C of five carbon atoms that is characteristic of isoprene and that recurs in the molecules of many natural compounds (as rubber, terpenes, vitamin A, vitamin E, phytol)
II. noun
( -s )
: an isoprenoid compound