Find the word definition

The Collaborative International Dictionary
Perpendicle

Perpendicle \Per*pen"di*cle\, n. [L. perpendiculum; per + pendere to hang: cf. F. perpendicule.] Something hanging straight down; a plumb line. [Obs.]

Wiktionary
perpendicle

n. (context obsolete English) Something hanging straight down; a plumb line.