epithecal
English edit
Etymology edit
Adjective edit
epithecal (not comparable)
- (microbiology, planktology) Of or pertaining to the epitheca, the upper half of the shell of certain types of plankton.
- 1919, G.M. Ehlers, “New Species of Tetracoralla”, in The American journal of science, volume XLVIII:
- The epithecal covering of the outer is annulated by low ridges and shallow grooves...Fine, close-set, concentric lines, probably representing lines of growth, are obscurely shown on a few of the better preserved portions of the epithecal surface.