Definitions
A reactive nonmetal element such as fluorine, chlorine, bromine, iodine, or astatine.
Word origin
From Ancient Greek ἅλς (háls, “salt" or "sea”) + γεν- (gen-), "to produce" (coined by Berzelius in 1842). By surface analysis, halo- (“salt”) + -gen (“forming”).
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Fluorine or chlorine, e.g.”7 letters
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