acotyledon acotyledon /ˌeɪkoʊˈtɪlɪdən/

noun

1. (botany) a plant that has no cotyledons, e.g. all flowerless plants, esp. fern and moss  ( acotyledon )
   (botany) a plant that has no cotyledons, e.g. all flowerless plants, esp. fern and moss