tetrad

In chemistry terms the difference between tetrad and bivalent

is that tetrad is a tetravalent atom or radical while bivalent is having a valence of 2.

As nouns the difference between tetrad and bivalent

is that tetrad is a group of four things while bivalent is any bivalent chromosome.

As an adjective bivalent is

having a valence of 2.

As nouns the difference between tetrad and quartet

is that tetrad is a group of four things while quartet is (music) a music composition in four parts, each performed by a single voice or instrument.

As nouns the difference between tetra and tetrad

is that tetra is any of several species of small south american freshwater fish of the family characidae, popular in home aquaria while tetrad is a group of four things.

As nouns the difference between tetras and tetrad

is that tetras is grouse, black grouse while tetrad is a group of four things.

As nouns the difference between taxonomy and tetrad

is that taxonomy is the science or the technique used to make a classification while tetrad is a group of four things.

Bivalant is likely misspelled.

Bivalant has no English definition.

As a noun tetrad is

a group of four things.

As a noun tetrad

is a group of four things.

As an adjective acalymmate is

(palynology) forming clusters of pollen grains (usually tetrads or polyads) in which the sexines of the respective grains do not merge to form a continuous sheath.