Part 796

Hem"i*stich (?; 277), n. [L. hemistichium, Gr. "hmisti`chion; "hmi- half + sti`chos row, line, verse: cf. F. hÈmistiche.] Half a poetic verse or line, or a verse or line not completed.

He*mis"ti*chal (?), a. Pertaining to, or written in, hemistichs; also, by, or according to, hemistichs; as, a hemistichal division of a verse.

Hem`i*sys"to*le (?), n. (Physiol.) Contraction of only one ventricle of the heart.

Hemisystole is noticed in rare cases of insufficiency of the mitral valve, in which both ventricles at times contract simultaneously, as in a normal heart, this condition alternating with contraction of the right ventricle alone; hence, intermittent hemisystole.

Hem"i*tone (?), n. [L. hemitonium, Gr. &?;.] See Semitone.

{ He*mit"ro*pal (?), He*mit"ro*pous (?), } a. [See Hemitrope.] 1. Turned half round; half inverted.

2. (Bot.) Having the raphe terminating about half way between the chalaza and the orifice; amphitropous; -- said of an ovule. Gray.

Hem"i*trope (?), a. [Hemi- + Gr. &?; to turn: cf. F. hÈmitrope.] Half turned round; half inverted; (Crystallog.) having a twinned structure.

Hem"i*trope, n. That which is hemitropal in construction; (Crystallog.) a twin crystal having a hemitropal structure.

He*mit"ro*py (?), n. (Crystallog.) Twin composition in crystals.

Hem"lock (?), n. [OE. hemeluc, humloc, AS. hemlic, hymlic.] 1. (Bot.) The name of several poisonous umbelliferous herbs having finely cut leaves and small white flowers, as the Cicuta maculata, bulbifera, and virosa, and the Conium maculatum. See Conium.

The potion of hemlock administered to Socrates is by some thought to have been a decoction of Cicuta virosa, or water hemlock, by others, of Conium maculatum.

2. (Bot.) An evergreen tree common in North America (Abies, or Tsuga, Canadensis); hemlock spruce.

The murmuring pines and the hemlocks.

Longfellow.

3. The wood or timber of the hemlock tree.

Ground hemlock, or Dwarf hemlock. See under Ground.

Hem"mel (?), n. [Scot. hemmel, hammel, Prov. E. hemble hovel, stable, shed, perh. allied to D. hemel heaven, canopy, G. himmel; cf. E. heaven. √14.] A shed or hovel for cattle. [Prov. Eng.] Wright.

Hem"mer (?), n. One who, or that which, hems with a needle. Specifically: (a) An attachment to a sewing machine, for turning under the edge of a piece of fabric, preparatory to stitching it down. (b) A tool for turning over the edge of sheet metal to make a hem.

Hem"o- (?). Same as HÊma-, HÊmo-.

Hem"o*glo"bin (?), n. [Hemo- + globe.] (Physiol.) The normal coloring matter of the red blood corpuscles of vertebrate animals. It is composed of hematin and globulin, and is also called hÊmatoglobulin. In arterial blood, it is always combined with oxygen, and is then called oxyhemoglobin. It crystallizes under different forms from different animals, and when crystallized, is called hÊmatocrystallin. See Blood crystal, under Blood.

Hem`o*glo"bin*om"e*ter (?), n. (Physiol. Chem.) Same as HÊmochromometer.

||Hem`o*phil"i*a (?), n. See Hematophilia.

He*mop"ty*sis (?), n. [NL., fr. Gr. a"i^ma blood + &?; to spit: cf. F. hÈmoptysie.] (Med.) The expectoration of blood, due usually to hemorrhage from the mucous membrane of the lungs.

Hem"or*rhage (?), n. [L. haemorrhagia, Gr. a"imorragi`a; a"i^ma blood + "rhgny`nai to break, burst: cf. F. hÈmorragie, hÈmorrhagie.] (Med.) Any discharge of blood from the blood vessels.

The blood circulates in a system of closed tubes, the rupture of which gives rise to hemorrhage.

Hem`or*rhag"ic (?), a. [Gr. a"imorragiko`s: cf. F. hÈmorrhagique.] Pertaining or tending to a flux of blood; consisting in, or accompanied by, hemorrhage.

Hem`or*rhoid"al (?), a. [Cf. F. hÈmorroÔdal, hÈmorrhoÔdal.] 1. Of or pertaining to, or of the nature of, hemorrhoids.