A structure that holds (or appears to hold) something in place; specifically †(a) = "proligerous disc" (obsolete); (b) a ligamentous band retaining tendons in place, especially in the region of the wrist and ankle (frequently with distinguishing English or scientific Latin word or words).

An arrangement of hooks, folds, or bristles, which interlocks the fore- and hindwings of various insects during flight; specifically that on the underside of the forewing in many butterflies and moths, engaging with a frenulum on the hindwing.

In collembolans: a fused pair of appendages which hold back the furcula before releasing it for a spring.

In plants of the acanthus family: each of the hooklike projections (modified funicles) on which the seeds are attached and which aid in their ejection; a jaculator.

In orchids: the sticky gland of the rostellum to which the stalk of each of the pollinia (pollen masses) adheres; a viscidium; now rare. In asclepiads: the armlike process borne by each of the pollinia to aid pollen transfer.