EPITHELIUM n.
The superficial layer of cells lining the alimentary canal and all its appendages, all glands and their ducts, blood vessels and lymphatics, serous cavities, etc. It often includes the epidermis (i. e., keratin-producing epithelial cells), and it is sometimes restricted to the alimentary canal, the glands and their app…
EXCRESCENCE n.
An excrescent appendage, as, a wart or tumor; anything growing out unnaturally from anything else; a preternatural or morbid development; hence, a troublesome superfluity; an incumbrance; as, an excrescence on the body, or on a plant. "Excrescences of joy." Jer. Taylor. The excrescences of the Spanish monarchy. Addison…
FIN n.
A finlike appendage, as to submarine boats. Apidose fin. (Zoöl.) See under Adipose, a. -- Fin ray (Anat.), one of the hornlike, cartilaginous, or bony, dermal rods which form the skeleton of the fins of fishes. -- Fin whale (Zoöl.), a finback. -- Paired fins (Zoöl.), the pectoral and ventral fins, corresponding to t…
FLEA n.
e dog flea (P. canis) takes its place. See Aphaniptera, and Dog flea. See Illustration in Appendix. A flea in the ear, an unwelcome hint or unexpected reply, annoying like a flea; an irritating repulse; as, to put a flea in one's ear; to go away with a flea in one's ear. -- Beach flea, Black flea, etc. See under Beach…