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raphe

ra·phe [ ráyfee ] (plural raphes)


noun 
Definition:
 
1. anatomy connecting ridge: a connecting ridge or seam between two similar parts of an organ of the body, e.g. between the two halves of the medulla oblongata or along the scrotum

2. botany ridge along some seed coats: a ridge along the coat of some seeds formed by fusion of the connecting stalk funiculus with the outer layer of the developing ovule

3. botany longitudinal groove: a longitudinal groove on the valve of a diatom

[Mid-18th century. Via modern Latin< Greek rhaphē "seam" < rhaptein "sew"]
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