- having a valency of fiveAlso: quinquevalent
WordReference Random House Unabridged Dictionary of American English © 2026
pen•ta•va•lent
(pen′tə vā′lənt, pen tav′ə-),USA pronunciation adj. [Chem.]
- Chemistryhaving a valence of 5:pentavalent arsenic.
- Chemistryquinquevalent (def. 2).
- penta- + -valent 1870–75
Collins Concise English Dictionary © HarperCollins Publishers::
pentavalent /ˌpɛntəˈveɪlənt/ adj
'pentavalent' also found in these entries (note: many are not synonyms or translations):
arsenic
- chloric
- iodic
- nitric
- pentad
- phosphoric
- quinquevalent
- antimonate
- antimonic
- bismuthic
- bromic
- orthophosphoric acid
- penta-
- tantalic
- tungstic
- vanadic