Definition of polycotyledonary in US English:

polycotyledonary

adjective

  • 1Zoology (Of a chorion or placenta) having many cotyledons (tufts of villi); (of an animal) having such a chorion or placenta. Now rare.

  • 2Botany. Of a plant embryo: = polycotyledonousrare.

Origin

Late 19th century; earliest use found in Proceedings of the Royal Society of London. From poly- + cotyledonary.

Pronunciation

polycotyledonary

/ˌpɒlɪˌkɒtɪˈliːd(ə)n(ə)ri/