Adamant :: Adamant (n.) A stone imagined by some to be of impenetrable hardness; a name given to the diamond and other substances of extreme hardness; but in modern mineralogy it has no technical signification. It is now a rhetorical or poetical name for the embodiment of impenetrable hardness.
Adamantean :: Adamantean (a.) Of adamant; hard as adamant.
Adamantine :: Adamantine (a.) Made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains..
Adamantine :: Adamantine (a.) Like the diamond in hardness or luster.
Adambulacral :: Adambulacral (a.) Next to the ambulacra; as, the adambulacral ossicles of the starfish..
Adansonia :: Adansonia (n.) A genus of great trees related to the Bombax. There are two species, A. digitata, the baobab or monkey-bread of Africa and India, and A. Gregorii, the sour gourd or cream-of-tartar tree of Australia. Both have a trunk of moderate height, but of enormous diameter, and a wide-spreading head. The fruit is oblong, and filled with pleasantly acid pulp. The wood is very soft, and the bark is used by the natives for making ropes and cloth..