Actinostome :: Actinostome (n.) The mouth or anterior opening of a coelenterate animal.
Agistor :: Agistor (n.) Formerly, an officer of the king's forest, who had the care of cattle agisted, and collected the money for the same; -- hence called gisttaker, which in England is corrupted into guest-taker..
Agistor :: Agistor (n.) Now, one who agists or takes in cattle to pasture at a certain rate; a pasturer..
Agrostology :: Agrostology (n.) That part of botany which treats of the grasses.
Air Stove :: Air stove () A stove for heating a current of air which is directed against its surface by means of pipes, and then distributed through a building..
Alpenstock :: Alpenstock (n.) A long staff, pointed with iron, used in climbing the Alps..
Alum Stone :: Alum stone () A subsulphate of alumina and potash; alunite.
Amazon Stone :: Amazon stone (n.) A variety of feldspar, having a verdigris-green color..
Amphistomous :: Amphistomous (a.) Having a sucker at each extremity, as certain entozoa, by means of which they adhere..