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Same as Rhachiodont.

Random. [Obs.] Spenser.

To reward. [Obs.] Shak.

Having gular teeth formed by a peculiar modification of the inferior spines of some of the vertebræ, as certain South African snakes (Dasypelits) which swallow birds' eggs and use these gular teeth to crush them.

A reptile whose teeth are rooted in sockets, as the crocodile.

Manganese spar, or silicate of manganese, a mineral occuring crystallised and in rose-red masses. It is often used as an ornamental stone.

Sardonic. [Obs.] "With Sardonian smile." Spenser.

-- applied only to a laugh, smile, or some facial semblance of gayety. Where strained, sardonic smiles are glozing still, And grief is forced to laugh against her will. Sir H. Wotton. The scornful, ferocious, sardonic grin of a bloody ruffian. Burke. Sardonic grin or laugh, an old medical term for a spasmodic affection…

A variety of onyx consisting of sard and white chalcedony in alternate layers.

Any one of a tribe (Sigmodontes) of rodents which includes all the indigenous rats and mice of America. So called from the form of the ridges of enamel on the crowns of the worn molars. Also used adjectively.

A wrapper. [Obs.] "Wrapped in sindons of linen." Bacon.

The larval form of any salamander while it still has external gills; especially, one of those which, like the axolotl (Amblystoma Mexicanum), sometimes lay eggs while in this larval state, but which under more favorable conditions lose their gills and become normal salamanders. See also Axolotl.

The larva of a bee. [Prov. Eng.]

An extinct genus of saber-toothed tigers. See Mach.

two species of singular West Indian insectivores, allied to the tenrec. One species (Solendon paradoxus), native of St. Domingo, is called also agouta; the other (S. Cubanus), found in Cuba, is called almique.

Same as Hatteria.

A genus of fossil whales belonging to the Phocodontia; -- so called because their are serrated, like a shark's.

Pertaining to Squalodon.

Having united cotyledonous.

, or band of fibrous connective tissue uniting a muscle with some other part; a sinew. Tendon reflex (Physiol.), a kind of reflex act in which a muscle is made to contract by a blow upon its tendon. Its absence is generally a sign of disease. See Knee jerk, under Knee.