Related Content
- Daily Word Quiz: languid
- Analogy of the Day: Today’s Analogy
- Spelling Bee: Today’s Spelling Bee
- Frequently Misspelled Words
- Frequently Mispronounced Words
- Easily Confused Words
- Writing & Language
phototonus: Meaning and Definition of
pho•tot•o•nus
Pronunciation: (fō-tot'n-us), [key]
— n. Biol.
- the normal condition of sensitiveness to light in organisms or their organs.
- the irritability exhibited by cytoplasm when exposed to light of a certain intensity.
