a. [ad. L. commissūrāl-is, f. commissūra: see next and -AL.] Of, pertaining to, or of the nature of a commissure; chiefly in reference to the commissures of nervous tissue.
1839. Todd, Cycl. Anat., II. 224/1. The lips may be thrown forward by the contraction of the labial and commissural fibres. Ibid. (1847), III. 627/1. The brain is … made up of a series of smaller masses … connected by what are called commissural or uniting fibres.
1869. Baring-Gould, Orig. Belief, 8. Distinct ganglia with commissural cords and nerves.
1870. Hooker, Stud. Flora, Umbelliferæ … normally there are 6 vittæ in each carpel, 4 between the primary ridges and 2 on the commissural face.
