raphe

noun

(Gr. raphê: seam) (pl. raphae) The part of the stalk of an anatropous ovule that is fused along the side of the ovule. A ridge on the seed formed by the portion of the funiculus fused to the seed coat. A ridge on a seed marking the line of fusion between an anatropous (inverted) ovule and the funicle. Any other groove, ridge, or suture line marking the line of fusion between two originally separate structures. Also rhaphe.