anˈthäsərəs noun
Usage: capitalized
Etymology: New Latin, from anth- (I) + -ceros (from Greek keras horn) — more at horn
: a genus of liverworts (family Anthocerotaceae) having slender hornlike or awllike 2-valved capsules, the thallus more than one cell thick, and the involucre covering only the base of the sporangium