What is "laminiplantar"

Laminiplantar \Lam`i*ni*plan"tar\, a. [Lamina + L. planta sole of the foot.] (Zo["o]l.) Having the tarsus covered behind with a horny sheath continuous on both sides, as in most singing birds, except the larks.

a. (context zoology English) Having the tarsus covered behind with a horny sheath continuous on both sides, as in most songbirds.