"having knots or joints," 1660s, from Latin geniculatus, from geniculum "little knee, knot on the stalk of a plant," diminutive of genu "knee" (see knee (n.)).
geniculate ge·nic·u·late (jə-nĭk'yə-lĭt) or ge·nic·u·lat·ed (-lā'tĭd)adj.
Bent abruptly, as a knee.
Of, relating to, or being the geniculate body or geniculate ganglion.
Having kneelike joints; able to bend at an abrupt angle.