Anhydrous
/ænˈhaɪdrəs/noun
Lacking water, especially in a chemical substance.
Did you know?Anhydrous comes from Greek roots that also gave us words like hydrogen and hydrate, so the same ancient water-root still haunts modern chemistry.
Etymological Timeline
Ancient Greek
Greek
anhydrōs
“without water; dry”
Late Latin
Latin
anhydrus
“dry; without water”
16th–17th Century
English
anhydrous
“dry, lacking water”
Modern English
English
anhydrous
“containing no water, especially in a chemical compound”