lunula
/ˈluːnjʊlə
/noun (plural lunulae /ˈluːnjʊliː/)
1The white area at the base of a fingernail.In patients with severe renal disease, the proximal portion of the nail bed can turn white, obliterating the lunula and giving a half-brown, half-white appearance, also called half-and-half nails....
- The whitish, half-moon-shaped area at the base of your nail is called the lunula (LOO-nu-luh).
- The whitish crescent-shaped area at the base of the nail is called the lunula.
2A crescent-shaped Bronze Age ornament worn as a necklace.
Derivatives
lunular
- The vane guide plate is inserted in the lunular hollow formed by the curved walls of the vane.
- Expression of ribs, and the lunular pit in Bothrocorbula, are used to a lesser extent for species discrimination.
- When the weapon is outside of the spheroid, its system is limited in its search to a lunular segment of a sphere.
lunulate
- The study has also resulted in a clearer picture of the biogeography and biostratigraphy of the Monophorasteridae, and their great significance in the evolution of lunulate sand dollars in the Americas.
- Mooi also established that other lunulate taxa such as the Astriclypeidae Stefanini, 1912, were not more closely related to the mellitids than monophorasterids.
- They also have important biogeographic implications, given that lunulate sand dollars are today rather rare in the regions in which monophorasterids were once common.
Origin
Late 16th century (denoting a crescent-shaped geometrical figure): from Latin, diminutive of luna 'moon'.