"Pentavalent" is a word in ENGLISH

Even; not odd; -- said of elementary substances and of radicals the valence of which is divisible by two without …

Degree of atomic attraction; equivalence; valence; also (a later use) the number of atoms in an elementary molecule. See Valence.

Pertaining to, or derived from, gold; -- said of those compounds of gold in which this element has its higher …

Pertaining to, or derived from, gold; -- said of those compounds of gold in which this element has its lower …

Of or pertaining to bismuth; containing bismuth, when this element has its higher valence; as, bismuthic oxide.

Of, or containing, bismuth, when this element has its lower valence.

A unit of chemical attraction; as, oxygen has two bonds of affinity. It is often represented in graphic formulae by …

Of, pertaining to, or containing, bromine; -- said of those compounds of bromine in which this element has a valence …

Pertaining to, or obtained from, chlorine; -- said of those compounds of chlorine in which this element has a valence …

Of, pertaining to, or derived from, chlorine; -- said of those compounds of chlorine in which this element has a …

Pertaining to, or obtained from, chromium; -- said of the compounds of chromium in which it has its higher valence.

Of, pertaining to, or derived from, chromium, when this element has a valence lower than that in chromic compounds.

Pertaining to, derived from, or containing, cobalt; -- said especially of those compounds in which cobalt has higher valence; as, …

Pertaining to, derived from, or containing, cobalt; -- said esp. of cobalt compounds in which the metal has its lower …

Having two units of combining power; bivalent. Cf. Valence.

An element, atom, or radical having a valence or combining power of two.

Having a valence or combining power of two; capable of being substituted for, combined with, or replaced by, two atoms …

The quantity of the combining power of an atom, expressed in hydrogen units; the number of hydrogen atoms can combine …

Pertaining to, derived from, or containing iron. Specifically (Chem.), denoting those compounds in which iron has a higher valence than …

Pertaining to, or derived from, iron; -- especially used of compounds of iron in which the iron has its lower …