The hard, smooth, stony seeds of Caesalpinia crista (syn. Guilandina crista), a prickly shrub of the Fabaceae family, with loosely spreading or climbing branches and bipinnate, prickly leaves.

(military) Initialism of Assault Amphibious Vehicle. / (virology) Abbreviation of adeno-associated virus. / (plumbing) Abbreviation of air admittance vent.

(organic chemistry) Any aryl derivative of a pyrrole

plural of tritoniid