labrum

From Latin lābrum (“lip”).

labrum (plural labrums or labra)

1. (entomology) The uppermost of the mouthparts (trophi) of a typical insect, such as a cockroach. Typically resembles an upper lip and forms part of the roof of the mouth in such insects.
2. (anatomy) Any of several lip-like projections.
3. A large basin of warm water, with an overhanging lip, in a Roman bath.

• glenoid labrum
• acetabular labrum

• labral

• brumal, lumbar, umbral

From Proto-Indo-European *leb- (“to hang down”). Cognate to labium and to English lip.[1]

• (Classical) IPA^(key): /ˈla.brum/, [ˈɫa.brũ]

labrum n (genitive labrī); second declension

1. lip
2. (by extension) edge, margin, brim, lip

Second declension.

• (lip): labia/labea/labium

• labellum
• labrōsus

Contraction from lavābrum (“bathing tub”), from lavō (“to wash, bathe”) +‎ -brum.

• (Classical) IPA^(key): /ˈlaː.brum/, [ˈɫaː.brũ]

lābrum n (genitive lābrī); second declension

1. A bathing tub, basin, bowl; bath, bathing place.

Second declension.

• (bathing tub): lavābrum
• (bathing place): lavācrum, lavātiō

• lābellum

• labrum in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• labrum in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• labrum in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• labrum in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
• Carl Meissner; Henry William Auden (1894) Latin Phrase-Book‎, London: Macmillan and Co.
  • to have a superficial knowledge, a smattering of literature, of the sciences: primis (ut dicitur) or primoribus labris gustare or attingere litteras
    
• labrum in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• labrum in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin