| Hubrecht, Ambrosius | <person> Dutch zoologist and comparative anatomist, 1853-1915. See: Hubrecht's protochordal knot. (05 Mar 2000) |
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| Hubrecht's protochordal knot | A local thickening of the blastoderm at the cephalic end of the primitive streak of the embryo. Synonym: Hensen's knot, Hensen's node, Hubrecht's protochordal knot, primitive knot, protochordal knot. (05 Mar 2000) |
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