raphe

A seamlike line or ridge between two similar parts of a body organ, as in the scrotum.

The portion of the funiculus that is united to the ovule wall, commonly visible as a line or ridge on the seed coat.

The median groove of a diatom valve.

In ornithology, the groove along the under side of the rachis of a feather.

In botany: In an anatropous or amphitropous (hemitropous) ovule or seed, the adnate cord which connects the hilum with the chalaza, commonly appearing as a more or less salient ridge, sometimes completely embedded in a fleshy testa of the seed. See cuts under anatropous and hemitropous.

A longitudinal line or rib on the valves of many diatoms, connecting the three nodules when present. (See nodule.) The usual primary classification of genera depends upon its presence or absence.

In anatomy, a seam-like union of two lateral halves, usually in the mesial plane, and constituting either a median septum of connective tissue or a longitudinal ridge or furrow; specifically, in the brain, the median lamina of decussating fibers which extends in the tegmental region from the oblongata up to the third ventricle.

A line, ridge, furrow, or band of fibers, especially in the median line.

Same as Rhaphe.

A ridge or seam on an organ, bodily tissue, or other structure, especially at the join between two halves or sections.