v.
Function: transitive verb
Inflected Form: trun · cat · ed ; trun · cat · ing
Date: circa 1727
1 : to shorten by or as if by cutting off
2 : to replace (an edge or corner of a crystal) by a plane
– trun · ca · tion \ tr ə ŋ - ' k ā -sh ə n, tr ə n- \ noun