Fungi which do not fit into traditional taxonomic classifications, because their reproduction has not been observed.

(grammar) A feature of a verb which denotes that its action or condition does not have a fixed temporal boundary, but is habitual, unfinished, continuous, repetitive or in progress.

(uncountable) Those qualities or features that are imperfect; the characteristic, state, or quality of being imperfect.

Of, relating to or having the properties of the imperfective aspect.

The imperfective aspect; a verb having this aspect.

plural of imperfection

plural of imperfective

(grammar) The state or quality of being imperfective

(linguistics) The creation of imperfective verb forms from perfective verb stems.

plural of imperfectivization