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That which (as a drug, or some kinds of food) excites to venery.

Mammals which have no placenta.

A division of Amphineura in which the body is naked or covered with slender spines or setæ, but is without shelly plates.

aberration; -- said of a lens. Aplanatic focus of a lens (Opt.), the point or focus from which rays diverging pass the lens without spherical aberration. In certain forms of lenses there are two such foci; and it is by taking advantage of this fact that the best aplanatic object glasses of microscopes are constructed.…

nchiata; the sea hare. Some of the species when disturbed throw out a deep purple liquor, which colors the water to some distance. See Illust. in Appendix.

An order of holothurians in which the internal respiratory organs are wanting; -- called also Apoda or Apodes.

Free from chromatic and spherical aberration; -- said esp. of a lens in which rays of three or more colors are brought to the same focus, the degree of achromatism thus obtained being more complete than where two rays only are thus focused, as in the ordinary achromatic objective. --Ap`o*chro"ma*tism (#), n.…

Specif.: Certain writings which are received by some Christians as an authentic part of the Holy Scriptures, but are rejected by others.

Belonging to, or resembling, a family of plants, of which the dogbane (Apocynum) is the type.

certain animals that have no feet or footlike organs; esp. one of certain fabulous birds which were said to have no feet.

One of the processes of the shell which project inwards and unite with one another, in the thorax of many Crustacea.

ional sentence, expressing the result, and thus distinguished from the protasis or clause which expresses a condition. Thus, in the sentence, "Though he slay me, yet will I trust in him," the former clause is the protasis, and the latter the apodosis.

Connected with the apogee; as, apogean (neap) tides, which occur when the moon has passed her apogee.

That point in the orbit of the moon which is at the greatest distance from the earth.

That branch of theology which defends the Holy Scriptures, and sets forth the evidence of their divine authority.

To offer an apology. [Obs.] For which he can not well apology. J. Webster.

Any one of the thicker and denser of the deep fasciæ which cover, invest, and the terminations and attachments of, many muscles. They often differ from tendons only in being flat and thin. See Fascia.

A figure by which a speaker formally declines to take notice of a favorable point, but in such a manner as to produce the effect desired. [For example, see Mark Antony's oration. Shak., Julius Cæsar, iii. 2.]

A figure in which the speaker professes to be at a loss what course to pursue, where to begin to end, what to say, etc.

A group of corals in which the coral is not porous; -- opposed to Perforata.