a. Zool. [f. L. terg-um the back + -AL.] Belonging to the tergum; dorsal.
1860. Mayne, Expos. Lex., Tergalis … tergal.
1870. Nicholson, Man. Zool., I. xxxiv. 192. The tergal elements of the thoracic rings.
1870. Rolleston, Anim. Life, 91. The eyes and antennae do not really belong to the tergal aspect of the … segment.
1880. Huxley, Crayfish, ii. 71. When the dorsal or tergal wall of the thorax is taken away.
