hema

n. [ L. haemachates; Gr. a"i^ma blood + 'acha`ths agate.] (Min.) A species of agate, sprinkled with spots of red jasper. [1913 Webster]

n. Same as Haemachrome. [ 1913 Webster ]

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

{ } n. [ Hema- + Gr. &unr_; course + -meter. ] (Physiol.) An instrument for measuring the velocity with which the blood moves in the arteries.

{ } n. (Physiol.) The act of measuring the velocity with which the blood circulates in the arteries; haemotachometry. [ 1913 Webster ]

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. [ 1913 Webster ]

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 haemomanometer. [ 1913 Webster ]

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. [1913 Webster]

☞ 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. [1913 Webster]

Hemal arch (Anat.), the ventral arch in a segment of the spinal skeleton, formed by vertebral processes or ribs. [1913 Webster]