haloid, a. and n. Chem.
(ˈhælɔɪd, ˈhæləʊɪd)
[f. Gr. ἅλς salt + -oid.]
A. adj. Having a composition like that of common salt (sodium chloride, NaCl); applied to all salts formed by the simple union of a halogen with a metal, as potassium iodide, KI. Now rare.
| 1841 Penny Cycl. XX. 369/2 Common salt is the principal of a class composed of a metal and such bodies as chlorine, iodine, bromine, and fluorine, and the radicals of the hydracids, and which are included by Berzelius in his class of haloid-salts..because in constitution they are analogous to sea-salt. 1863–74 Watts Dict. Chem. III. 6 The term haloïd is still occasionally applied to the chlorides, bromides, iodides, fluorides, and cyanides. 1873 Fownes' Chem. (ed. 11) 537 Haloid Ethers are Compounds of hydrocarbons with halogens. 1875 Ure's Dict. Arts II. 782 Modern ideas on the constitution of salts have greatly tended to weaken the old distinction between haloïd salts and oxysalts. |
B. n. A salt of this nature. Superseded by halide.
| 1846 in Worcester. 1854–67 C. A. Harris Dict. Med. Terminol. s.v. Halogens, Salts thus formed are termed haloids. 1881 S. Thompson in Design & Work 24 Dec. 454 Chief amongst those substances are chlorine and the haloids. |