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geniculate

adjective Biology.

having kneelike joints or bends.
bent at a joint like a knee.

adjective

biology bent at a sharp anglegeniculate antennae
having a joint or joints capable of bending sharply

adj.

“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.)).

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.