elaiosome plant_anatomy PO:0020062 May be a modified arilloid (a type of strophiole or caruncle) or may be an outgrowth of a fruit. May be attractive to ants and aid in dispersal. elaiosoma (Spanish, exact) A cardinal organ part that is an oil-secreting outgrowth of a seed or fruit. 油脂体 (Japanese, exact) cardinal organ part