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A genus of parasitic insects including the fleas. See Flea.

Fourfold; folded or doubled twice. Quadruplex system (Electric Telegraph), a system by which four messages, two in each direction, may be sent simultaneously over the wire.

Directed back; attended by reflection; retroactive; introspective. The reflex act of the soul, or the turning of the intellectual eye inward upon its own actions. Sir M. Hale.

Bent backward or outward.

The quality or capability of being reflexible; as, the reflexibility of the rays of light. Sir I. Newton.

ted, or thrown back. The light of the sun consists of rays differently refrangible and reflexible. Cheyne.

See Reflection. Chaucer.

The state or condition of being reflected. [R.]

Bending or turned backward; reflective; having respect to something past. Assurance reflexive can not be a divine faith. Hammond.

In a reflex manner; reflectively.

Reflexed; bent or turned abruptly backward.

The act of reflexing; the state of being retroflexed. Cf. Retroversion.

The embryo produced directly from the egg in a metagenetic series, especially the larva of a tapeworm or other parasitic worm. See Illust. of Echinococcus.

Perplexed by doubts originating in one's own mind.

Partially amplexicaul; embracing the stem half round, as a leaf.

Half bent.

Silica, SiO2 as found in nature, constituting quarz, and most sands and sandstones. See Silica, and Silicic.

Havingthree principal operative parts or motions, so as to produce a three-fold effect.

A mineral occurring in white rounded crystalline masses. It is a hydrous borate of lime and soda.

Inflexible.