n.
Pronunciation: ' al-k ə - ˌ lo ̇ id
Function: noun
Date: circa 1831
: any of numerous usually colorless, complex, and bitter organic bases (as morphine or caffeine) containing nitrogen and usually oxygen that occur especially in seed plants and are typically physiologically active
– al · ka · loi · dal \ ˌ al-k ə - ' lo ̇ i-d ə l \ adjective