Definify.com

Webster 1913 Edition

ref.

[Gr.

πεντα-

, a later combining form of

πέντε

five. See

A combining form denoting five;

as,

penta

capsular;

penta

gon.

(Chem.)

Denoting the degree of five, either as regards quality, property, or composition;

as,

penta

sulphide,

containing five sulfur atoms

;

pent

oxide,

containing five oxygen atoms

, etc.

Also used adjectively.