1º_ Diminutive of sheath ( "sheath, elongated shell, . . . " ) . 2º_ By the previous one, common name of the plant Vanilla planifolia and of many other species of Orchidaceae, whose fruits (also called 'vanilla') are shaped like a pod containing the seeds. 3º_ Species of sponge cake in long portions and vanilla flavor, although the name also comes from the form .