ppl. a. (UN-1 8.)
[1775. Ash.]
1870. Rolleston, Anim. Life, 119. The thickened glandular three-fourths of these segments are separated off from the ventrally placed and unthickened fourth.
1884. Bower & Scott, De Bary’s Phaner., 160. The unthickened portion of the membrane.
