Meaning
An isometric-hextetrahedral grayish white mineral containing mercury and selenium; mercury selenide, chemical formula HgSe.
Etymology
Origin: Unknown
From Tiemann + -ite, after Johann Carl Wilhelm Tiemann (1848–1899).
NYT Puzzle Appearances
No published puzzle dates on file for this word yet. It is part of the official NYT Spelling Bee word list for 2020, 2025.