Part 176

SIN´CIPUT, n. Anterior half of pileus, from bill to vertex. (32.)

SINIS´TRAD, a. Toward the left.

SINISTRAL, a. On the left side.

SI´NUS, n. Name of numerous and various cavities of the body.

SKEL´ETON, n. Sum of the bones of a body. It generally means only the endoskeleton proper, or internal bony framework of the body, as distinguished from exoskeleton or dermoskeleton.

SOLE, n. (106.)

SOLES OF TOES, n. (118.)

SO´LEUS, n. A muscle of the leg.

SPAT´ULATE, a. Spoon-shaped; contracted near the end, where enlarged.

SPE´CIES, n. Aggregate of individuals related by genetic succession without notable change of physical characters.

SPECIF´IC, a. Of, or relating to, a species; as, specific name, specific character.

SPEC´ULUM, n. Mirror; brightly colored area on the secondaries, especially of ducks.

SPERM, n. The secretion of the testicles; same as semen.

SPERMAT´IC, a. Pertaining to semen, or to the organs concerned in its production and emission.

SPERMATOZO´A, n. pl. Essence of the male seed.

SPHE´NOID (bone), n. A compound bone of the skull, constituting much of the second cranial segment.

SPHENOID´AL, n. Relating to the sphenoid.

SPHINC´TER, n. An annular muscle constricting or closing a natural orifice; especially, sphincter ani.

SPI´NAL, a. Relating to the backbone.

SPINA´LIS, a. for n. Name of a certain muscle of the back.

SPINE, n. Backbone. Also, any sharp projecting point of bone or horn.

SPINOSE´ or SPI´NOUS, a. Sometimes said of a mucronate feather.

SPLANCH´NIC, a. Visceral.

SPLANCHNOL´OGY, n. Science or study of the viscera.

SPLEEN, n. A deep red, soft, spongy, ductless and extremely vascular, abdominal organ of uncertain function.

SPLE´NIAL, a. Name of a certain element of the mandible.

SPLE´NIUS, a. for n. A certain cervical muscle.

SPUR, n. (108.)