I. ˈrez ə nˌȯid adjective
Etymology: resin (I) + -oid
: somewhat like resin : more or less resinous
II. noun
( -s )
1. : a resinoid substance ; especially : a thermosetting synthetic resin either before or after curing
resinoid bonds for abrasives
2. pharmacy
a. : any of a class of resinlike preparations introduced by the eclectics and made by pouring a concentrated alcoholic extract of a drug into cold water and separating and drying the precipitate formed
b. : gum resin
c. : any of various flower essences used in the perfume industry