(geology) An igneous rock that crystallized at considerable depth in the crust; plutonic rock.

(geography) The oceanic realm consisting of the deep ocean, typified by a dearth of plant life, and plentiful carnivorous animals that are able to withstand extreme pressure.

plural of abyssal plain

plural of abyssal fish

(oceanography) A long steep-sided depression in the ocean floor.

(dated, usually capitalized) Of or pertaining to Ethiopia or its inhabitants; Ethiopian.

A short-haired domestic cat descended from cats of ancient Egypt making it one of the oldest breeds in the world; Abyssinian cat. / A member of the Abyssinian Church. / (dated) A native of Ethiopia.

The Amharic language.

(obsolete) Alternative form of abyss

(historical) Ethiopian Empire (Ethiopia and Eritrea).