adenia noun2 •Any plant in the genus Adenia, especially those which, like the genus Adenium (family Apocynaceae), are grown by collectors for their distinctive swollen stems or trunks. •(old-fashioned) Synonym of lymphadenia.Simple adenia occurs oftenest between the ages of twenty and thirty, then again it is frequent between fifty and sixty. Leukaemic adenia is most frequent between the ages of thirty and forty. — 1891 formsAdenias · adenias