HEMIPTERAN
He*mip"ter*an, n. (Zoöl.)
Defn: One of the Hemiptera; an hemipter.
HEMISECT
Hem`i*sect", v. t. [imp. & p. p. Hemisected; p. pr. & vb. n.
Hemisecting.] Etym: [Hemi- + L. secare to cut.] (Anat.)
Defn: To divide along the mesial plane.
HEMISECTION
Hem`i*sec"tion, n. (Anat.)
Defn: A division along the mesial plane; also, one of the parts so divided.
HEMISPHERE Hem"i*sphere, n. Etym: [L. hemisphaerium, Gr. hémisphère. See Hemi-, and Sphere.]
1. A half sphere; one half of a sphere or globe, when divided by a plane passing through its center.
2. Half of the terrestrial globe, or a projection of the same in a map or picture.
3. The people who inhabit a hemisphere. He died . . . mourned by a hemisphere. J. P. Peters. ten Cerebral hemispheres. (Anat.) See Brain. — Magdeburg hemispheres (Physics), two hemispherical cups forming, when placed together, a cavity from which the air can be withdrawn by an air pump; — used to illustrate the pressure of the air. So called because invented by Otto von Guericke at Magdeburg.