Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun atomic_number_53

1 sense of atomic number 53

Sense 1
iodine, iodin, I, atomic number 53 -- (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))
       => chemical element, element -- (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 -- (any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions)