a. [f. L. triquetr-us (see below) + -AL.] = TRIQUETROUS.
Triquetral bones, small bones of irregular triangular form, sometimes found in the sutures of the skull; also called Wormian bones.
1646. Prynne, Laud, 124. Plate for the Chappell…. A triquetrall Censor.
1804. Shaw, Gen. Zool., V. 420. Triquetral Trunk-fish.
1861. Hagen, Synopsis Neuroptera N. Amer., 159. Abdomen triquetral.
