Abaculus :: Abaculus (n.) A small tile of glass, marble, or other substance, of various colors, used in making ornamental patterns in mosaic pavements..
Allusion :: Allusion (n.) A figurative or symbolical reference.
Allusion :: Allusion (n.) A reference to something supposed to be known, but not explicitly mentioned; a covert indication; indirect reference; a hint..
Alveolus :: Alveolus (n.) A small cavity in a coral, shell, or fossil.
Alveolus :: Alveolus (n.) A small depression, sac, or vesicle, as the socket of a tooth, the air cells of the lungs, the ultimate saccules of glands, etc..
Andalusite :: Andalusite (n.) A silicate of aluminium, occurring usually in thick rhombic prisms, nearly square, of a grayish or pale reddish tint. It was first discovered in Andalusia, Spain..
Angelus :: Angelus (n.) A form of devotion in which three Ave Marias are repeated. It is said at morning, noon, and evening, at the sound of a bell..
Annulus :: Annulus (n.) A ring; a ringlike part or space.
Annulus :: Annulus (n.) A space contained between the circumferences of two circles, one within the other..
Annulus :: Annulus (n.) The solid formed by a circle revolving around a line which is the plane of the circle but does not cut it.
Annulus :: Annulus (n.) Ring-shaped structures or markings, found in, or upon, various animals..
Aplustre :: Aplustre (n.) An ornamental appendage of wood at the ship's stern, usually spreading like a fan and curved like a bird's feather..
Argulus :: Argulus (n.) A genus of copepod Crustacea, parasitic of fishes; a fish louse. See Branchiura..
Arillus :: Arillus (n.) A exterior covering, forming a false coat or appendage to a seed, as the loose, transparent bag inclosing the seed or the white water lily. The mace of the nutmeg is also an aril..
Articulus :: Articulus (n.) A joint of the cirri of the Crinoidea; a joint or segment of an arthropod appendage.
Asilus :: Asilus (n.) A genus of large and voracious two-winged flies, including the bee killer and robber fly..
Astragalus :: Astragalus (n.) The ankle bone, or hock bone; the bone of the tarsus which articulates with the tibia at the ankle..
Astragalus :: Astragalus (n.) A genus of papilionaceous plants, of the tribe Galegeae, containing numerous species, two of which are called, in English, milk vetch and licorice vetch. Gum tragacanth is obtained from different oriental species, particularly the A. gummifer and A. verus..