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A common composite herb (Achillea Millefolium) with white flowers and finely dissected leaves; yarrow. Water milfoil (Bot.), an aquatic herb with dissected leaves (Myriophyllum).

The dissection, or that part of anatomy which treats of the dissection, of muscles.

The dissection of dead bodies; also, excision of necrosed bone. --Nec`ro*tom"ic (#), a. --Nec*rot"o*mist (#), n.

An instrument for cutting or dissecting nerves.

The dissection, or anatomy, of the nervous system.

The anatomy or dissection of birds.

The dissection or anatomy of bones; osteology.

The dissection of plants; vegetable anatomy.

One who prepares beforehand, as subjects for dissection, specimens for preservation in collections, etc. Agassiz.

One who makes dissections for anatomical illustration; usually, the assistant of a professional anatomist.

stion; problematical; doubtful; suspicious. It is questionable whether Galen ever saw the dissection of a human body.T. Baker.

A dissecting instrument for opening the spinal canal. [Written also rachiotome.]

One who steals bodies from the grave, as for dissection. [Slang]

A small knife with a thin, keen blade, -- used by surgeons, and in dissecting.

Assisting sight, as a lens or the like. [Obs.] Thy specular orb Apply to well-dissected kernels; lo! In each observe the slender threads Of first-beginning trees. J. Philips.

The dissection, or anatomy, of the viscera.

physical operation or process; specifically (Anat.), a dead body used for the purpose of dissection.

sh. [Obs.] Pepys. Double tansy (Bot.), a variety of the common tansy with the leaves more dissected than usual. -- Tansy mustard (Bot.), a plant (Sisymbrium canescens) of the Mustard family, with tansylike leaves.

To perform vivisection upon; to dissect alive. [Colloq.] Pop. Sci. Monthly.

The dissection of an animal while alive, for the purpose of making physiological investigations.