(taxonomy) A collection of organisms that is given formal recognition at the rank of genus with a taxonomic name, but which is known to be an artificial group rather than a natural one.

plural of form class

(taxonomy) A collection of organisms that is given formal recognition at the rank of class with a taxonomic name, but which is known to be an artificial group rather than a natural one.

plural of form taxon

A free-form shape or artwork.

Having an unconventional, variable or asymmetric form. / (role-playing games) Referring to a roleplaying game which does not use a formal system of rules.

(calculus) a covector field

(logic) Alternative form of argument form

(philosophy) The Platonic form of the supreme idea in which all other ideas participate. / The subject object relation.

Alternative form of urform