a. Anat. [f. TRANS- 5 + L. atlas, atlant-em (see ATLAS) + -AL.] Transverse to, or crossing the atlas (vertebra).
1893. Athenæum, 25 March, 382/2. Abnormal vertebræ of certain Ranidæ … in which the so-called ‘atlas’ possessed transverse processes and trans-atlantal nerves.
