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ich, according to the hypothesis of Haeckel, man and all other animals, that in the first stages of their individual evolution pass through a two-layered structural stage, or gastrula form, must have descended. This idea constitutes the Gastræa theory of Haeckel. See Gastrula.

r wall (the hypoblast). See Illust. under Invagination. In a more general sense, an ideal stage in embryonic development. See Gastræa. -- a.

A single step or stage in the succession of natural descent; a rank or remove in genealogy. Hence: The body of those who are of the same genealogical rank or remove from an ancestor; the mass of beings living at one period; also, the average lifetime of man, or the ordinary period of time at which one rank follows anot…

An action represented in sports, plays, or on the stage; show; ceremony. [Obs.] Mede.

A staff formerly used in fighting beasts on the stage. [Obs.] Bailey.

es; graduated. Beginning with the genus, passing through all the graduate and subordinate stages. Tatham.

mall, wormlike body inclosing a nucleus, but without external organs; in one of the young stages, they are amoebiform; -- called also Gregarinida, and Gregarinaria.

eatedly changed from absolute despotism to republicanism, not forgetting the intermediate stages of oligarchy, limited monarchy, and even gynocracy; for I myself remember Alsatia governed for nearly nine months by an old fishwoman. Sir H. Scott.

es and white corpuscles; a third kind of blood corpuscle, supposed by some to be an early stage in the development of the red corpuscles; -- called also blood plaque, and blood plate.

e encountered the enemy at the hazard of his reputation and life. Men are led on from one stage of life to another in a condition of the utmost hazard. Rogers

Hectic fever (Med.), a fever of irritation and debility, occurring usually at a advanced stage of exhausting disease, as a in pulmonary consumption.

Passing through the different stages in its life history on an alternation of hosts, as the common wheat-rust fungus (Puccinia graminis), and certain other parasitic fungi; -- contrasted with autocious. -- Het`er*o"cism (#), n.

Deviating from the normal, perfect, or mature form; having different forms at different stages of existence, or in different individuals of the same species; -- applied especially to insects in which there is a wide difference of form between the larva and the adult, and to plants having more than one form of flower.…

Of or relating to the stage or a stageplayer; befitting a theatre; theatrical; -- sometimes in a bad sense. -- His`tri*on"ic*al*ly, adv. Tainted with false and histrionic feeling. De Quincey.

The histronic art; stageplaying. W. Black.

To act; to represent on the stage, or theatrically. Urquhart.

The upper stage of a porcelian furnace.

tipation, with griping pains in the abdomen, which is greatly distended, and in the later stages by vomiting of fecal matter. Called also ileac, or iliac, passion.

Beginning to be, or to show itself; commencing; initial; as, the incipient stage of a fever; incipient light of day. -- In*cip"i*ent*ly, adv.

crated place for the purpose of dreaming oracular dreams. Tylor. Period of incubation, or Stage of incubation (Med.), the period which elapses between exposure to the causes of a disease and the attack resulting from it; the time of development of the supposed germs or spores.