- Turbinal Tur"bi*nal, a. [L. turbo, turben, -inis, a top,
Rolled in a spiral; scroll-like; turbinate; -- applied to the
thin, plicated, bony or cartilaginous plates which support
the olfactory and mucous membranes of the nasal chambers.
Note: There are usually several of these plates in each nasal chamber. The upper ones, connected directly with the ethmoid bone, are called ethmoturbinals, and the lower, connected with the maxill[ae], maxillo-turbinals. Incurved portions of the wall of the nasal chamber are sometimes called pseudoturbinals, to distinguish them from the true turbinals which are free outgrowths into the chambers. [1913 Webster]
The Collaborative International Dictionary of English. 2000.