epithelial

[ ep-uh-thee-lee-uhl ]

adjective

Biology. being or relating to an epithelium, any tissue that lines a cavity or covers a surface in an animal or plant: Cheek epithelial cells are often studied in school labs as they are easily obtained through a mouth rinse or swab.

Origin of epithelial

First recorded in 1935–40; epitheli(um) + -al¹

These neurons have microscopic finger-like protrusions called cilia, which float in the mucus covering the surface of the nasal epithelium.
The Doctor Will Sniff You Now - Issue 95: Escape | Lina Zeldovich | February 3, 2021 | Nautilus
The area at the back of the nose, the olfactory epithelium, that has the cells that translate this odor molecule into experience of smelling something, you know, that area has hundreds of millions of cells in the dog, 300 million.
Forget Everything You Know About Your Dog (Ep. 436) | Stephen J. Dubner | October 22, 2020 | Freakonomics
(a) epithelial casts contain epithelial cells from the renal tubules.
A Manual of Clinical Diagnosis | James Campbell Todd
Any epithelial cell may be so granular from degenerative changes that the nucleus is obscured.
A Manual of Clinical Diagnosis | James Campbell Todd
The meshes also contain leukocytes, epithelial cells, and granular dbris.
A Manual of Clinical Diagnosis | James Campbell Todd

It begins to form early in the embryo life as an epithelial ingrowth from the throat, and extends from the neck into the chest.
Man And His Ancestor | Charles Morris
We find the outer wall made up of a thin layer of cells, the epithelial layer.
A Civic Biology | George William Hunter

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