vesˈicatory (or /-ikˈ/) noun and adjective

Vesicant

vesˈicle noun (medicine and zoology)

1. A small globule, bladder, sac, blister, cavity, or swelling
2. A primary cavity of the vertebrate brain
3. A more or less spherical cavity in igneous rock caused by expansion of gases

vesicˈūla noun (pl vesicˈūlae /-lē/)

A vesicle

vesicˈūlar adjective

vesicˈūlāte intransitive verb

To become vesicular

vesicˈūlate /-lət/ or vesicˈūlāted adjective

vesicūlāˈtion noun

Formation of vesicles

vesicˈūlose adjective

vesica piscis /pisˈis/ noun

(L, fish's bladder) a halo in the form of two circular arcs each (properly) passing through the other's centre, enclosing the whole figure