Part 792

Spenser.

To hem about, around, or in, to inclose and confine; to surround; to environ. "With valiant squadrons round about to hem." Fairfax. "Hemmed in to be a spoil to tyranny." Daniel. -- To hem out, to shut out. "You can not hem me out of London." J. Webster.

Hem"a- (?). Same as HÊma-.

Hem"a*chate (?), n. [L. haemachates; Gr. a"i^ma blood + &?; agate.] (Min.) A species of agate, sprinkled with spots of red jasper.

Hem"a*chrome (?), n. Same as HÊmachrome.

Hem"a*cite (?), n. [Gr. a"i^ma blood.] A composition made from blood, mixed with mineral or vegetable substances, used for making buttons, door knobs, etc.

{ Hem`a*drom"e*ter (?), Hem`a*dro*mom"e*ter (?), } n. [Hema- + Gr. &?; course + - meter.] (Physiol.) An instrument for measuring the velocity with which the blood moves in the arteries.

{ Hem`a*drom`e*try (?), Hem`a*dro*mom"e*try (?), } n. (Physiol.) The act of measuring the velocity with which the blood circulates in the arteries; hÊmotachometry.

He`ma*dy*nam"ics (?), n. [Hema- + dynamics.] (Physiol.) The principles of dynamics in their application to the blood; that part of science which treats of the motion of the blood.

He`ma*dy"na*mom"e*ter (?), n. [Hema- + dynamometr.] (Physiol.) An instrument by which the pressure of the blood in the arteries, or veins, is measured by the height to which it will raise a column of mercury; -- called also a hÊmomanometer.

He"mal (?), a. [Gr. a"i^ma blood.] Relating to the blood or blood vessels; pertaining to, situated in the region of, or on the side with, the heart and great blood vessels; -- opposed to neural.

As applied to vertebrates, hemal is the same as ventral, the heart and great blood vessels being on the ventral, and the central nervous system on the dorsal, side of the vertebral column.

Hemal arch (Anat.), the ventral arch in a segment of the spinal skeleton, formed by vertebral processes or ribs.

Hem`a*phÊ"in (?), n. Same as HÊmaphÊin.

||Hem`a*poph"y*sis (?), n.; pl. Hemapophyses . [NL. See HÊma-, and ||Apophysis.] (Anat.) The second element in each half of a hemal arch, ||corresponding to the sternal part of a rib. Owen. -- ||Hem`a*po*phys"i*al (#), a.

{ Hem`a*stat"ic (?), Hem`a*stat"ic*al (?), } a. & n. Same as Hemostatic.

Hem`a*stat"ics (?), n. (Physiol.) Laws relating to the equilibrium of the blood in the blood vessels.

Hem`a*ta*chom"e*ter (?), n. Same as HÊmatachometer.

Hem`a*te"in (?), n. [Gr. &?;, &?;, blood.] (Chem.) A reddish brown or violet crystalline substance, C16H12O6, got from hematoxylin by partial oxidation, and regarded as analogous to the phthaleins.

||Hem`a*tem"e*sis (?), n. [NL., fr. Gr. a"i^ma, a"i`matos, blood + &?; ||a vomiting, fr. &?; to vomit.] (Med.) A vomiting of blood.

Hem"a*therm (?), n. [Gr. a"i^ma blood + &?; warm.] (Zoˆl.) A warm- blooded animal. [R.]

Hem`a*ther"mal (?), a. (Zoˆl.) Warm-blooded; hematothermal.

He*mat"ic (?), a. Same as HÊmatic.

He*mat"ic, n. (Med.) A medicine designed to improve the condition of the blood.

Hem"a*tin (?), n. [Gr. a"i^ma, a"i`matos, blood.] 1. Hematoxylin.

2. (Physiol. Chem.) A bluish black, amorphous substance containing iron and obtained from blood. It exists the red blood corpuscles united with globulin, and the form of hemoglobin or oxyhemoglobin gives to the blood its red color.

Hem`a*ti*nom"e*ter (?), n. [Hematin + -meter.] (Physiol. Chem.) A form of hemoglobinometer.

Hem`a*tin`o*met"ric (?), a. (Physiol.) Relating to the measurement of the amount of hematin or hemoglobin contained in blood, or other fluids.