HARVEST n.
e time of harvest in England, or about the autumnal equinox, when, by reason of the small angle that is made by the moon's orbit with the horizon, it rises nearly at the same hour for several days. -- Harvest mouse (Zoöl.), a very small European field mouse (Mus minutus). It builds a globular nest on the stems of whea…
HEMIHEDRAL a.
ch full symmetry would require, as when a cube has planes only on half of its eight solid angles, or one plane out of a pair on each of its edges; or as in the case of a tetrahedron, which is hemihedral to an octahedron, it being contained under four of the planes of an octahedron. -- Hem`i*he"dral*ly, adv.…
HEPTAGONAL a.
Having seven angles or sides. Heptagonal numbers (Arith.), the numbers of the series 1, 7, 18, 34, 55, etc., being figurate numbers formed by adding successively the terms of the arithmetical series 1, 6, 11, 16, 21, etc.