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See Ichthyosauria.

The typical limb, or lateral fin, of fishes.

An extinct genus of toothed birds found in the American Cretaceous formation. It is remarkable for having biconcave vertebræ, and sharp, conical teeth set in sockets. Its wings were well developed. It is the type of the order Odontotormæ.

One of the Ichthyosaura.

An extinct order of marine reptiles, including Ichthyosaurus and allied forms; -- called also Ichthyopterygia. They have not been found later than the Cretaceous period.

Of or pertaining to the Ichthyosauria. -- n.

An extinct genus of marine reptiles; -- so named from their short, biconcave vertebræ, resembling those of fishes. Several species, varying in length from ten to thirty feet, are known from the Liassic, Oölitic, and Cretaceous formations.

A disease in which the skin is thick, rough, and scaly; -- called also fishskin. -- Ich`thy*ot"ic, a.

One skilled in ichthyotomy.

The anatomy or dissection of fishes. [R.]

Same as Ichthus.

A written or printed notice to be posted, as on a wall; a poster; a placard.

A kind of gun metal, containing copper, zinc, and iron, but no tin.

Exhibiting or producing two colors, as substances which in the color test may change red litmus to blue and blue litmus to red.

See Antechamber.

Any substance (but especially sodium hyposulphite) used in removing the excess of chlorine left in paper pulp or stuffs after bleaching.

A denier or opponent of Christ. Specif.: A great antagonist, person or power, expected to precede Christ's second coming.

Opposed to the Christian religion.

Opposition or contrariety to the Christian religion.

In an antichristian manner.