retinaculum
(redirected from extensor retinaculum of hand)Also found in: Dictionary, Medical.
retinaculum
[‚ret·ən′ak·yə·ləm] (invertebrate zoology)
A clasp on the forewing of certain moths for retaining the frenulum of the hindwing.
An appendage on the third abdominal somite of springtails that articulates with the furcula.