S0271000 (sē′pəl)n. One of the usually green leaflike structures composing the outermost part of a flower. Sepals often enclose and protect the bud and may remain after the fruit forms.[New Latin sepalum, perhaps blend of Greek skepē, covering and Latin petalum, petal; see petal.]sep′a·line(sĕp′ə-lĭn), sep′a·lous(-ləs) adj.EncyclopediaSeesepal