divalent

As an adjective divalent

is (chemistry) having a valence of two.

As a noun butenylidene is

(organic chemistry|especially in combination) any of four isomeric divalent radicals derived from a butene.

As an adjective divalent

is (chemistry) having a valence of two.

As an adverb divalently is

in a divalent way.

As an adjective divalent

is (chemistry) having a valence of two.

As a noun propidium is

(organic compound) a divalent organic cation having the chemical formula c₂₇h₃₄n₄²⁺.