The Collaborative International Dictionary of English v.0.48:

Haloid \Ha"loid\ (h[=a]"loid or h[a^]l"oid), a. [Gr. "a`ls,
   "alo`s salt + -oid: cf. F. halo["i]de.] (Chem.)
   Resembling salt; -- said of certain binary compounds
   consisting of a metal united to a negative element or
   radical, and now chiefly applied to the chlorides, bromides,
   iodides, and sometimes also to the fluorides and cyanides. --
   n. A haloid substance.
   [1913 Webster]