I. ˈpälēˌad noun
( -s )
Etymology: poly- + -ad
1. : a group consisting of several closely related parts or elements
2. : a polyad atom, radical, or element
II. adjective
1. or poly·ad·ic | ̷ ̷ ̷ ̷|adik : of, relating to, or constituting a polyad
2.
[ poly- + -ad ]
: polyvalent