Noun: umbra
| Singular | umbra |
| Plural | umbras; umbrae |
Sample Sentences
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In order to set up such an algorithm, we need the notion of multiplicative inverse of an umbra. Two umbrae are said to be multiplicative inverse to each other when αγ ≡ u. [2009, Ernesto Damiani, Ottavio D'Antona, Vincenzo Marra, From Combinatorics to Philosophy: The Legacy of G.-C. Rota, (page 113)#:]
Nouns inflected like umbra
conferva,
fenestra,
terra,
umbra,
cornucopia,
primigravida,
telangiectasia,
medusa,
cornea,
cicada,
hernia,
formula,
penumbra,
vagina,
retina,
Etymology
Borrowed from Latin umbra (“shadow”). Doublet of umber. See: Latin Nouns '
umbra'.