selenite

/S EH1 L IH0 N AY0 T/
noun
  1. 1

    A soft, glassy form of gypsum (chemical formula CaSO4·2H2O).

  2. 2

    The anion SeO32− derived from selenous acid; any salt or ester of selenous acid.

Synonyms

Source: https://en.wiktionary.org/wiki/selenite