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Having reference to the placenta; as, the placentary system of classification.

Consisting of five; arranged by fives. Boyle. Quinary system (Zoöl.), a fanciful classification based on the hypothesis that each group contains five types.

To be placed in order; to be ranked; to admit of arrangement or classification; to rank. And range with humble livers in content. Shak.

To bring into a certain order, arrangement, classification, etc.; to bring under rules or within certain limits of descriptions and terms adapted to use in computation; as, to reduce animals or vegetables to a class or classes; to reduce a series of observations in astronomy; to reduce language to rules.…

One of a class of vegetable organisms, in the classification of Cohn, which includes all of the inferior forms that multiply by fission, whether they contain chlorophyll or not.

Agreeing with, or depending on, the rules or principles of science; as, a scientific classification; a scientific arrangement of fossils.

r pertaining to the science of signs, or the systematic use of signs; as, a semeiological classification of the signs or symptoms of disease; a semeiological arrangement of signs used as signals.

of a series; appearing in successive parts or numbers; as, a serial work or publication. "Classification . . . may be more or less serial." H. Spencer.

ies of butterflies which have two kinds of females. -- Sexual method (Bot.), a method of classification proposed by Linnæus, founded mainly on difference in number and position of the stamens and pistils of plants. -- Sexual selection (Biol.), the selective preference of one sex for certain characteristics in the oth…

The science which has to do with the collection and classification of certain facts respecting the condition of the people in a state.

More comprehensive; as a term in classification; as, a genus is superior to a species.

According to symptoms; as, a symptomatical classification of diseases. -- Symp`tom*at"ic*al*ly, adv.

Not agreeing with some artificial system of classification.

Pertaining to, or involving, taxonomy, or the laws and principles of classification; classificatory.

That division of the natural sciences which treats of the classification of animals and plants; the laws or principles of classification.

logy which relates to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct.