a. and sb. [ad. L. transversāri-us lying across: see TRANSVERSE and -ARY. Cf. F. transversaire (Littré).]
† A. adj. Transverse. Obs. rare1.
c. 1400. Lanfrancs Cirurg., 148. Þe wesant haþ noon [brawnys] transuersarie, þat is to seie goynge ouerþwert, for wiþholdynge is not nedeful to him.
B. sb. † 1. The transverse beam or member of a cross. Obs. rare1. [L. transversarium cross-beam.]
a. 1608. Dee, Relat. Spir., I. (1659), 185. Neither of the letters in the Transversary of the black Crosse.
2. A cross-piece or vane of a cross-staff. Hist.
1594. J. Davis, Seamans Secr. (1607), 17. Your staffe so ordered, then moue the transversary upon your staffe to and fro as occasion requireth.
1638. Oughtred, in Rigaud, Corr. Sci. Men (1841), I. 31. For setting the degrees on the transversary.
1879. A. Geikie, in Encycl. Brit., X. 187/1. The cross-staff was a very simple instrument, consisting of a graduated pole with cross pieces, called transversaries , also graduated, which were fitted to work on it.