umbra recta
umbra recta · umbra rectas
On a shadow in the shape of a right triangle, the length of the shadow's edge adjacent…On a shadow in the shape of a right triangle, the length of the shadow's edge adjacent to a measured angle.
/ˈʌmbɹə ˈɹɛktə/
Meaning
1 sensesOn a shadow in the shape of a right triangle, the length of the shadow's edge adjacent to a measured angle.
Origin
First attested in Modern English in 1688, although the phrase was also used in Middle EnglFirst attested in Modern English in 1688, although the phrase was also used in Middle English by Geoffrey Chaucer (c. 1343–1400) in his Treatise on the Astrolabe; Latin: umbra (“shadow”) + rēcta (feminine nominative singular of rēctus, “straight”) = “straight shadow”; compare umbra versa.
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Forms
plural: umbra rectas| Singular | umbra recta |
|---|---|
| Plural | umbra rectas |
regular
Synonyms
1 synonymsumbra extensa