(historical) A component of armor, consisting of overlapping plates designed to protect the buttocks. / A small, flat face often cut at the base of a brilliant-cut gemstone.

plural of headrail

The trivalent organotin radical CH₃(CH₂)₂O-CO-(CH₂)₂Sn typically present as a trihalide ...-SnX₃

(zoology) Any clam in the family Malleidae.