Definition of elaiosome in US English:

elaiosome

noun

Botany
  • Any of various oil-rich structures or tissues attached to or surrounding the seeds of certain plants; especially one that acts as an attractant to ants that aid dispersal by carrying the seed away from the plant.

Origin

Early 20th century; earliest use found in New Phytologist. From German Elaiosom from elaio- (from ancient Greek ἔλαιον oil: see elaeo-) + -som.

Pronunciation

elaiosome

/ɪˈlʌɪəsəʊm/