Definitions for "Lacuna"
A small opening; a small pit or depression; a small blank space; a gap or vacancy; a hiatus.
A small opening; a small depression or cavity; a space, as a vacant space between the cells of plants, or one of the spaces left among the tissues of the lower animals, which serve in place of vessels for the circulation of the body fluids, or the cavity or sac, usually of very small size, in a mucous membrane.
Latin lacus = lake, hence, a small pond or gap, adjective, lacunar.
Oval, superficial structural marking in the upper stroma level. Can be open or closed at the edge, usually occurs in the area of the frill. Lacuna is the most common iris marking which is genetic and has other words to describe its structure, see ladder lacuna, open lacuna, closed lacuna, circular lacuna, cruciferous lacuna, crytiform lacuna, half-sided lacuna, iodine lacuna, medusoid lacuna, porosis lacuna, rhomboid lacuna, rooftile lacuna and twin lacuna. The lacuna is oval and appears to dislodge the surface fibers of the iris. The lacuna can be open or closed and is mainly seen in the kidney, pancreas and heart zones. It indicates organ insufficiency, but may never be seen to become evident as a symptom or disease.
Perforation (true pore) between costae making up the frontal shield in some Cheilostomata (Hayward & Ryland, 1979). Figures: Corbulipora
Lacuna (Woodstock) is a fictional character, a mutant and the occasional ally of the superhero group X-Statix.
an ornamental sunken panel in a ceiling or dome
In lophate grains, a depressed area surrounded by ridges ( Plate 23: 384). Pl. lacunae.
Keywords:  blind, mental, spot
a mental blind spot
Keywords:  lateral, roots
Lateral Roots