The nuclear weapon that is the nuclear deterrent of the United Kingdom

A three-pronged spear somewhat resembling a pitchfork. / (geometry) A curve of third order of the form:

plural of trident

Having three teeth / (botany) Having tooth-like projections that are themselves bidentate. / (chemistry, of a ligand) Capable of attaching to a metal ion at three points

Having three prongs; tridentate.

Having three teeth; tridentate.

Having three prongs or tines.

plural of trident bat

A species of bat, Asellia tridens.

Paratriaenops pauliani, a species of Old World leaf-nosed bat.