PERIOSTRACUM

Etymology

Noun

periostracum (plural periostraca)

(malacology) The proteinaceous outer sheath of many molluscan shells.

Source: Wiktionary


Per`i*os"tra*cum, n.; pl. Periostraca. Etym: [NL., fr. Gr. (Zoöl.)

Definition: A chitinous membrane covering the exterior of many shells; -- called also epidermis.

Source: Webster’s Unabridged Dictionary 1913 Edition



RESET




Word of the Day

12 February 2025

MEGACOLON

(noun) an abnormal enlargement of the colon; can be congenital (as in Hirschsprung’s disease) or acquired (as when children refuse to defecate)


coffee icon

Coffee Trivia

The average annual yield from one coffee tree is the equivalent of 1 to 1 1/2 pounds of roasted coffee. It takes about 4,000 hand-picked green coffee beans to make a pound of coffee.

coffee icon