Having an annular form or shape. / (botany) Describes a fern sporangium that has an annulus. / (mycology) Describes a mushroom with an annulus on the stipe.

(zoology) One of the Annulata.

plural of annulate

Having rings / (organic chemistry) Composed of several fused rings

(transitive) To formally revoke the validity of. / (transitive) To dissolve (a marital union) on the grounds that it is not valid.

The formation of a ring / (organic chemistry) Any reaction that forms a ring of atoms / Any structure in the form of a ring

plural of annulment

plural of annuler

The person or authority that annuls.

Capable of being annulled.