Definition of raphae:
(n) :
(anatomy) A seamlike ridge or furrow on an organ, bodily tissue, or other structure, typically marking the line where two halves or sections fused in the embryo.
(n) :
The connecting ridge between the two halves of the medulla oblongata or the tegmentum of the midbrain.
(n) :
(botany) The part of the stalk of an anatropous ovary that is united in growth to the outside covering and forms a ridge along the body of the ovule.
(n) :
(botany) A longitudinal median groove in the valve of many diatoms.