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groove (grldbomacv) a narrow, linear hollow or depression; see also fissure and sulcus. branchial groove
pharyngeal groove. Harrison groove
a horizontal groove along the lower border of the thorax corresponding to the costal insertion of the diaphragm; seen in advanced
rickets in childhood. medullary groove
, neural groove
that formed by the beginning invagination of the neural plate of the embryo to form the neural tube. pharyngeal groove
a groove between a pair of pharyngeal arches in a mammalian embryo, homologous to the branchial cleft of a fish, formed by rupture of the membrane separating a corresponding entodermal pouch and ectodermal groove.
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