Hypernym

noun

any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter

halogen 1

noun

any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions

Substance_meronym

seawater 1

noun

water containing salts

iodin 1

noundomain: substance

Princeton WordNet [ver.3.1]

English

Definition

a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)