n. [ L. amarus bitter. ] (Chem.) A characteristic crystalline substance, obtained from oil of bitter almonds. [ 1913 Webster ]

n. (Min.) A transparent, pale green variety of beryl, used as a gem. See Beryl. [ 1913 Webster ]

n. [ Convallaria + L. amarus bitter. ] (Chem.) A white, crystalline, poisonous substance, regarded as a glucoside, extracted from the lily of the valley (Convallaria Majalis). Its taste is first bitter, then sweet. [ 1913 Webster ]

n. (Chem.) A glucoside extracted from the bittersweet (Solanum Dulcamara), as a yellow amorphous substance. It probably occasions the compound taste. See Bittersweet, 3(a). [ 1913 Webster ]

n. A common thorny tropical American tree (Pithecellobium dulce) having terminal racemes of yellow flowers followed by sickle-shaped or circinate edible pods and yielding good timber and a yellow dye and mucilaginous gum.
Syn. -- camachile, huamachil, wild tamarind, Pithecellobium dulce. [ WordNet 1.5 ]

n. [ From the native name in Cayenne. ] (Zool.) Any one of several species of small squirrel-like South American monkeys of the genus Midas, especially Midas ursulus. [ 1913 Webster ]

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n. [ It. tamarindo, or Sp. tamarindo, or Pg. tamarindo, tamarinho, from Ar. tamarhindī, literally, Indian date; tamar a dried date + Hind India: cf. F. tamarin. Cf. Hindu. ] (Bot.) 1. A leguminous tree (Tamarindus Indica) cultivated both the Indies, and the other tropical countries, for the sake of its shade, and for its fruit. The trunk of the tree is lofty and large, with wide-spreading branches; the flowers are in racemes at the ends of the branches. The leaves are small and finely pinnated. [ 1913 Webster ]

2. One of the preserved seed pods of the tamarind, which contain an acid pulp, and are used medicinally and for preparing a pleasant drink. [ 1913 Webster ]

Tamarind fish, a preparation of a variety of East Indian fish with the acid pulp of the tamarind fruit. --
Velvet tamarind. (a) A West African leguminous tree (Codarium acutifolium). (b) One of the small black velvety pods, which are used for food in Sierra Leone. --
Wild tamarind (Bot.), a name given to certain trees somewhat resembling the tamarind, as the Lysiloma latisiliqua of Southern Florida, and the Pithecolobium filicifolium of the West Indies. [ 1913 Webster ]

n. [ Cf. Sp. ultramarino. So called because the lapis lazuli was originally brought from beyond the sea, -- from Asia. ] (Chem.) A blue pigment formerly obtained by powdering lapis lazuli, but now produced in large quantities by fusing together silica, alumina, soda, and sulphur, thus forming a glass, colored blue by the sodium polysulphides made in the fusion. Also used adjectively. [ 1913 Webster ]

Green ultramarine, a green pigment obtained as a first product in the manufacture of ultramarine, into which it is changed by subsequent treatment. --
Ultramarine ash or
Ultramarine ashes (Paint.), a pigment which is the residuum of lapis lazuli after the ultramarine has been extracted. It was used by the old masters as a middle or neutral tint for flesh, skies, and draperies, being of a purer and tenderer gray than that produced by the mixture of more positive colors. Fairholt. [ 1913 Webster ]

a. [ Pref. ultra- + marine. ] Situated or being beyond the sea. Burke. [ 1913 Webster ]