English Dictionary

fluorine

noun

(uncountable) The chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals.

Fluorine is a highly reactive chemical element.

意味（1）

(uncountable) The chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals.

意味（2）

(chemistry, countable) A single atom of this element.

an octahedron of fluorines