To save this word, you'll need to log in.
val·en·ti·nite | \ ˈvalən‧ˌtēˌnī+ \
plural -s
Definition of valentinite
: a mineral Sb2O3 consisting of antimony oxide in orthorhombic crystals polymorphous with senarmontite
Keep scrolling for more
Test Your Vocabulary
Challenging Vocabulary Quiz Returns!

- Which is a synonym of fuliginous?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games




















Share valentinite