Umbra
Definition, Meaning & Examples
Pronunciation /ˈʌmbɹə/ · Part of speech noun
Quick meaning: Umbra is a noun meaning The fully shaded inner region of a shadow cast by an opaque object.
Meaning
The fully shaded inner region of a shadow cast by an opaque object.
More Meanings
- (astronomy) The central region of a sunspot.
- One of the family Umbridae of mudminnows.
- One of genus Umbrina of drums (family Sciaenidae).
- (mathematics) An element of the umbral calculus.
- (chiefly literary) A shadow.
- (archaic) An uninvited guest brought along by one who was invited.
Example Sentences
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.
Word Forms
- umbras
- umbrae
Related Words
Related dictionary entries include shadow, penumbra, antumbra, underlighting, undertone, underlight.
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Sources & Attribution
FreeDictionaryAPI.com / Wiktionary · Original source · CC BY-SA 4.0
Dictionary data is provided by FreeDictionaryAPI.com and sourced from Wiktionary under its stated license.