Dictionary.com
Thesaurus.com

apiculus

American  
[uh-pik-yuh-luhs, ey-pik-] / əˈpɪk yə ləs, eɪˈpɪk- /

noun

Botany.

plural

apiculi
  1. a small point or tip.


Etymology

Origin of apiculus

1860–65; < New Latin, equivalent to apic- (stem of apex ) apex + -ulus -ule