protium

Noun

pro=ti=um

WORDNET DICTIONARY

protium(n = noun.plant) genus protium - genus of chiefly tropical American trees having fragrant wood and yielding gum elemi; Array

is a kind of rosid dicot genus

is a member of burseraceae, family burseraceae, torchwood family

protium, n. the ordinary isotope of hydrogen as distinct from heavy hydrogen (cf. DEUTERIUM, TRITIUM).

Etymology

mod.L f. PROTO- + -IUM