(taxonomy) A collection of organisms that is given formal recognition at some rank with a taxonomic name, but which is known to be a grouping based on similar morphological characteristics, rather than more extensive biological similarity.

plural of form class

(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 taxon

plural of application form

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

A free-form shape or artwork.

(formal, euphemistic) Addictive; likely to cause dependence or recurrence of use.

(physics) The ratio of the RMS value to the absolute mean of a sinusoidal wave (especially to that of an alternating current)

plural of form factor