-form

CIDE DICTIONARY

-form, n. [See Form, n.].

 A suffix used to denote in the form or shape of, resembling, etc.; as, valiform; oviform.  [1913 Webster]

OXFORD DICTIONARY

-form, comb. form (usu. as -iform) forming adjectives meaning:
1 having the form of (cruciform; cuneiform).
2 having such a number of (uniform; multiform).

Etymology

from or after F - forme f. L -formis f. forma FORM