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The hide of a horse.

Any sea snake of the genus Hydrophys and allied genera. These snakes are venomous, live upon fishes, and have a flattened tail for swimming.

One of a series of compounds, derived from hydrogen sulphide by the replacement of half its hydrogen by a base or basic radical; as, potassium hydrosulphide, KSH. The hydrosulphides are analogous to the hydrates and include the mercaptans.

A substance from the egg yolk of osseous fishes.

A beetle of the genus Melolontha, and allied genera. See May beetle, under May.

A binary compound of methyl with some element; as, aluminium methide, Al2(CH3)6.

A sulphide containing one atom of sulphur, and analogous to a monoxide; -- contrasted with a Ant: polysulphide; as, galena is a monosulphide.

A compound of naphthalene or its radical with a metallic element; as, mercuric naphthide.

The order of reptiles which includes the serpents.

One of the Ophidia; a snake or serpent.

Of or pertaining to the Ophidiidæ, a family of fishes which includes many slender species. -- n.

The typical genus of ophidioid fishes. [Written also Ophidium.] See Illust. under Ophidioid.

Ophidian.

Any plant of the order Orchidaceæ. See Orchidaceous.

Pertaining to, or resembling, a natural order (Orchidaceæ) of endogenous plants of which the genus Orchis is the type. They are mostly perennial herbs having the stamens and pistils united in a single column, and normally three petals and three sepals, all adherent to the ovary. The flowers are curiously shaped, often…

Orchidaceous.

Same as Orchidaceous.

One versed in orchidology.

The branch of botany which treats of orchids.

A brachiopod shell of the genus Orthis, and allied genera, of the family Orthidæ.