English English Dictionary

A scale series of four sounds, of which the extremes, or first and last, constituted a fourth. These extremes were immutable; the two middle sounds were changeable.

Having a division by fours; separated into four parts or series, or into series of fours.

Capable of neutralizing four molecules of a monobasic acid; having four hydrogen atoms capable of replacement ba acids or acid atoms; -- said of certain bases; thus, erythrine, C4H6(OH)4, is a tetracid alcohol.

Having four cocci, or carpels.

A stanza or division in lyric poetry, consisting of four verses or lines.

Same as Rugosa.

Any species of sponge of the division Tetractinellida. Also used adjectively.

A division of Spongiae in which the spicules are siliceous and have four branches diverging at right angles. Called also Tetractinellinae.

The number four; a collection of four things; a quaternion.

A tetravalent or quadrivalent atom or radical; as, carbon is a tetrad.

Alt. of Tetradactyle

Tetradactylous.

Having, or characterized by, four digits to the foot or hand.

A light oily hydrocarbon, C14H30, of the marsh-gas series; -- so called from the fourteen carbon atoms in the molecule.

Same as Arthrostraca.

Of or pertaining to a tetrad; possessing or having the characteristics of a tetrad; as, a carbon is a tetradic element.

A person in some way remarkable with regard to the number four, as one born on the fourth day of the month, or one who reverenced four persons in the Godhead.

See Tetrodon.

See Tetrodont.

Alt. of Tetradrachma