noun🔗ShareAdelfaNerium oleander, a notoriously poisonous shrub in the dogbane family, Apocynaceae, but nonetheless widely grown as an ornamental, having leathery lance-shaped leaves and deep rose-colored or white flowers."The bright pink flowers of the oleander in my neighbor's garden are beautiful, but I know I shouldn't touch them because they are poisonous. "Las flores de color rosa brillante de la adelfa en el jardín de mi vecino son hermosas, pero sé que no debería tocarlas porque son venenosas.plantnatureorganismbiologyenvironmentChat with AIVocabulary GamePractice Reading