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lunula Syllabification: lu·nu·la
Pronunciation: /ˈlo͞onyələ/

Definition of lunula in English:

noun (plural lunulae-ˌlē-ˌlī)

1A crescent-shaped object or mark, in particular.
1.1The white area at the base of a fingernail.
Example sentences
  • 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.
1.2 Printing One of a pair of parentheses.
Example sentences
  • It is this contrast between the syntactical presumption of the lunulae and the effect is actually has which poets have exploited.


Late 16th century (denoting a crescent-shaped geometric figure): from Latin, diminutive of luna 'moon'.



Example sentences
  • 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.


Pronunciation: /-ˌlāt/ /-lit/
Example sentences
  • 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.

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Pronunciation: fôrˈtisəˌmō
(especially as a direction) very loud or loudly