ulcus

Definition

A rounded, pore-like aperture at either pole of a pollen grain.

Etymology

From Latin ulcus (“sore”). Doublet of ulcer.

Example Sentences

• "He also likes the vapor-cauterization of Wesseli (100° C.), which does not produce an action at a distance. It also helps for deep scrophulous ulcera."
• "By the observations and experiments of numbers of clinicians and investigators it has become certain now that the central brain, particularly the hypothalamus, is of great importance for the origin of erosions and ulcera of the stomach."
• "V. E., ♀.born 1920 (File Nr. 27, 26 October to 8 January 1954). Gastrectomy in March 1953 because of multiple ulcera of the stomach."