1. Multiplicity of sounds, as in the reverberations of an echo.

2. Plurality of sounds and articulations expressed by the same vocal sign.

3. (Mus.)

Defn: Composition in mutually related, equally important parts which share the melody among them; contrapuntal composition; — opposed to homophony, in which the melody is given to one part only, the others filling out the harmony. See Counterpoint.

POLYPHORE
Pol"y*phore, n. Etym: [Poly- + Gr. (Bot.)

Defn: A receptacle which bears many ovaries.

POLYPHOTAL; POLYPHOTE
Pol`y*pho"tal, Pol"y*phote, a. [Poly- + Gr., , light.] (Elec.)

Defn: Pertaining to or designating arc lamps so constructed that more than one can be used on a single circuit.

POLYPHYLETIC
Pol`y*phy*let"ic, a. Etym: [Poly- + Gr. (Biol.)

Defn: Pertaining to, or characterized by, descent from more than one root form, or from many different root forms; polygenetic; — opposed to Ant: monophyletic.