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Having the first and second toes turned backward, as in the trogons.

Relating to, or characterized by, heterotaxy.

Having six-rayed spicules; belonging to the Hexactinellinæ.

Belonging to the Hexactinellinæ, a group of sponges, having six-rayed siliceous spicules.

The Anthozoa.

Having six fingers or toes.

Any species or marine hydroids, of the genus Hydractinia and allied genera. These hydroids form, by their rootstalks, a firm, chitinous coating on shells and stones, and esp. on spiral shells occupied by hermit crabs. See Illust. of Athecata.

An apparatus for drying anything, as yarn, cloth, sugar, etc., by centrifugal force; a centrifugal.

The under side of the toes.

Contact or impression by touch; collision; forcible contact; force communicated. The quarrel, by that impact driven. Southey.

Driven together or close. Impacted fracture (Surg.), a fracture in which the fragments are driven into each other so as to be immovable.

agment of bone into another so that the fragments are not movable upon each other; as, impaction of the skull or of the hip.

The state or quality of being impracticable; infeasibility. Goldsmith.

Not practicable; incapable of being performed, or accomplished by the means employed, or at command; impossible; as, an impracticable undertaking.

The state or quality of being impracticable; impracticability.

In an impracticable manner. Morality not impracticably rigid. Johnson.

Not practical.

Not abstracted.

Want of action or activity; forbearance from labor; idleness; rest; inertness. Berkeley.

Not active; having no power to move; that does not or can not produce results; inert; as, matter is, of itself, inactive.