Defn: Pertaining to, or based upon, many cones. Polyconic projection (Map Making), a projection of the earth's surface, or any portion thereof, by which each narrow zone is projected upon a conical surface that touches the sphere along this zone, the conical surface being then unrolled. This projection differs from conic projection in that latter assumes but one cone for the whole map. Polyconic projection is that in use in the United States coast and geodetic survey.
POLYCOTYLEDON Pol`y*cot`y*le"don, n. Etym: [Poly- + cotyledon: cf. F. polycotylédone.] (Bot.)
Defn: A plant that has many, or more than two, cotyledons in the
seed.
— Pol`y*cot`y*led"on*ous, a.
POLYCOTYLEDONARY
Pol`y*cot`y*led"on*a*ry, a. Etym: [Poly- + cotyledonary.] (Anat.)
Defn: Having the villi of the placenta collected into definite patches, or cotyledons.
POLYCRACY
Po*lyc"ra*cy, n. Etym: [Poly- + -cracy, as in democracy.]
Defn: Government by many rulers; polyarchy.
POLYCROTIC
Pol`y*crot"ic, a. Etym: [Poly- + Gr. (Physiol.)
Defn: Of or pertaining to polycrotism; manifesting polycrotism; as, a polycrotic pulse; a polycrotic pulse curve.
POLYCROTISM
Po*lyc"ro*tism, n. (Physiol.)