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A genus of extinct oölitic fishes, having rounded teeth in several rows adapted for crushing.

A genus of ganoid fishes, found in strata of the new red sandetone, and the lias bone beds. Agassiz.

A genus of trees (Celtis) related to the elm, but bearing drupes with scanty, but often edible, pulp. C. occidentalis is common in the Eastern United States. Gray.

A genus of leguminous plants containing but a single species, the H. Campechianum or logwood tree, native in Yucatan.

Certain species of nematodes of the genus Filaria, sometimes found in the blood of man, the horse, the dog, etc.

A plant of the genus Prunus (P. Padus); the bird cherry. [Scot.]

One of several species of sea birds of the genus Puffinus; esp., P. major, the greater shearwarter, and P. Stricklandi, the black hagdon or sooty shearwater; -- called also hagdown, haglin, and hag. See Shearwater.

A butterfly of the genus Thecla; as, the green hairstreak (T. rubi).

Any species of marine fishes of the genus Trichiurus; esp., T. lepterus of Europe and America. They are long and like a band, with a slender, pointed tail. Called also bladefish.

A nematoid worm of the genus Gordius, resembling a hair. See Gordius.

A kingfisher. By modern ornithologists restricted to a genus including a limited number of species having omnivorous habits, as the sacred kingfisher (Halcyon sancta) of Australia. Amidst our arms as quiet you shall be As halcyons brooding on a winter sea. Dryden.

A genus of American shrubs containing several species, called snowdrop trees, or silver-bell trees. They have showy, white flowers, drooping on slender pedicels.

Any slender, marine fish of the genus Hemirhamphus, having the upper jaw much shorter than the lower; -- called also balahoo.

A shell of the genus Crepidula; a boat shell. See Boat shell.

A genus of marine shells; the ear-shells. See Abalone.

Like or pertaining to the genus Haliotis; ear-shaped.

A genus of Silurian fossil corals; the chain corals. See Chain coral, under Chain.

A genus of plants which includes the witch-hazel (Hamamelis Virginica), a preparation of which is used medicinally.

A fossil cephalopod of the genus Hamites, related to the ammonites, but having the last whorl bent into a hooklike form.

ning metal by hammering it when cold. -- Hammer shell (Zoöl.), any species of Malleus, a genus of marine bivalve shells, allied to the pearl oysters, having the wings narrow and elongated, so as to give them a hammer-shaped outline; -- called also hammer oyster. -- To bring to the hammer, to put up at auction.…