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The operation of finding the primitive function which has a given function for its differential coefficient. See Integral.

Modified evolution, in which nonprimitive characters make their appearance in consequence of a secondary adaptation of the embryo to the peculiar conditions of its environment; -- distinguished from palingenesis. [Written also cænogenesis.]

A primitive Chinese instrument of the cittern kind, with from five to twenty-five silken strings. Riemann.

The regular changes which the primitive Indo-European stops, or mute consonants, underwent in the Teutonic languages, probably as early as the 3d century b. c. , often called the first Lautverschiebung, sound shifting, or consonant shifting. (b) A somewhat similar set of changes taking place in the High German dialects…

t (propounded by the German philologist Jacob Grimm) of certain regular changes which the primitive Indo-European mute consonants, so-called (most plainly seen in Sanskrit and, with some changes, in Greek and Latin), have undergone in the Teutonic languages. Examples: Skr. bhatr, L. frater, E. brother, G. bruder; L. tr…

-- Medullary sheath (Anat.), the layer of white semifluid substance (myelin), between the primitive sheath and axis cylinder of a medullated nerve fiber.

All that part of the alimentary canal which is developed from the primitive enteron and is lined with hypoblast. It is distinguished from the stomod, a part at the anterior end of the canal, including the cavity of the mouth, and the proctod, a part at the posterior end, which are formed by invagination and are lined w…

A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven's larva.

enteric canal, which, in embroys of many vertebrates, connects the medullary tube and the primitive intestine. See Illust. of Ectoderm.

The delicate outer sheath of a nerve fiber; the primitive sheath.

An embryo or certain invertebrates in the stage when the primitive band is first developed.

h is developed beneath the medullary groove in the vertebrate embryo, and constitutes the primitive axial skeleton around which the centra of the vertebræ and the posterior part of the base of the skull are developed; the chorda dorsalis. See Illust. of Ectoderm.

e, n. -- Oblique circle (Projection), a circle whose plane is oblique to the axis of the primitive plane. -- Oblique fire (Mil.), a fire the direction of which is not perpendicular to the line fired at. -- Oblique flank (Fort.), that part of the curtain whence the fire of the opposite bastion may be discovered. Wilh…

Pertaining to the origin or beginning; preceding all others; first in order; primitive; primary; pristine; as, the original state of man; the original laws of a country; the original inventor of a process. His form had yet not lost All her original brightness. Milton.

Primitive; primary; original. [R.] The grand originary right of all rights. Hickok.

Of or pertaining to the Osci, a primitive people of Campania, a province of ancient Italy. -- n.

Of or relating to the god Pan. Pandean pipes, a primitive wind instrument, consisting of a series of short hollow reeds or pipes, graduated in length by the musical scale, and fastened together side by side; a syrinx; a mouth organ; -- said to have been invented by Pan. Called also Pan's pipes and Panpipes.…

The primitive perivisceral cavity.

The penis or clitoris, or the embryonic or primitive organ from which either may be derived.

Among the primitive Christians, a case in which the relics of the dead were inclosed.