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One of the Diatomaceæ, a family of minute unicellular Algæ having a siliceous covering of great delicacy, each individual multiplying by spontaneous division. By some authors diatoms are called Bacillariæ, but this word is not in general use.

Containing two atoms.

Having a single, distinct, diagonal cleavage; -- said of crystals. Mohs.

One who dichotomizes. Bacon.

nto two divisions; to divide into pairs; to bisect. [R.] The apostolical benediction dichotomizes all good things into grace and peace. Bp. Hall.

Regularly dividing by pairs from bottom to top; as, a dichotomous stem. -- Di*chot"o*mous*ly, adv.

A cutting in two; a division. A general breach or dichotomy with their church. Sir T. Browne.

An instrument for measuring the dilatation or expansion of a substance, especially of a fluid.

To destroy the force of habit in; to wean from a custom. Johnson.

To take out from a tomb; a disinter.

A genus of parasitic, trematode worms, having two suckers for attaching themselves to the part they infest. See 1st Fluke,

Divided into twos or threes.

Cleaving with difficulty.

The more transparent cells, which finally become external, in many segmenting ova, as those of mammals.

The cutting a fetus into pieces within the womb, so as to effect its removal.

The act or art of dissecting the brain.

A plate which supports the labrum in certain Crustacea.

And endostoma.

Divination by the use of a mirror.

A kind of scissors used for opening the intestinal canal, as in post-mortem examinations.