HALOGEN n.
h, by combination with a metal, forms a haloid salt; especially, chlorine, bromine, and iodine; sometimes, also, fluorine and cyanogen. See Chlorine family, under Chlorine.
HAND n.
, or get, the better of another person or thing. -- To his hand, To my hand, etc., in readiness; already prepared. "The work is made to his hands." Locke. -- To hold hand, to compete successfully or on even conditions. [Obs.] Shak. -- To lay hands on, to seize; to assault. -- To lend a hand, to give assistance. --…
HOMOLOGY n.
to the relation between chemical elements of the same group; as, chlorine, bromine, and iodine are said to be in homology with each other. Cf. Heterology. General homology (Biol.), the higher relation which a series of parts, or a single part, bears to the fundamental or general type on which the group is constituted.…
HYDRIODIC a.
Pertaining to, or derived from, hydrogen and iodine; -- said of an acid produced by the combination of these elements. Hydriodic acid (Chem.), a pungent, colorless gas, HI, usually prepared as a solution in water. It is strong reducing agent. Called also hydrogen iodine.