having four wings or wing-like appendages.

Of a fruit: resembling a small nut, spec. indehiscent.

Resembling a samara.

Not dehiscent: said of fruits that do not split open when mature, but retain the seed till they decay.

designating a single-seeded fruit typical of cereals and grasses in which the pericarp is fused to the seed coat.

= nucamentaceous, adj.

= pseudospermic adj.

Having four wings; spec. in Entomology applied to four-winged flies; in Botany having four wing-like appendages, as certain fruits.

Of or characteristic of an achene; of the nature of an achene.

Of the nature of a Cypsela, n.

‘resembling or belonging to a schizocarp’ (Cent. Dict. 1891).