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ENGLISH DICTIONARY

Umbra

/ˈʌmbɹə/ · noun

Meaning

The fully shaded inner region of a shadow cast by an opaque object..

Definitions by Sense

  1. The fully shaded inner region of a shadow cast by an opaque object.
  2. (astronomy) The central region of a sunspot.
  3. (chiefly literary) A shadow.
  4. (archaic) An uninvited guest brought along by one who was invited.
  5. One of the family Umbridae of mudminnows.
  6. One of genus Umbrina of drums (family Sciaenidae).
  7. (mathematics) An element of the umbral calculus.

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.

Synonyms for umbra

Antonyms for umbra

Related Words

shadowpenumbraantumbraunderlightingundertoneundereyeunderlightsubfoveaunderglowunderportionsuburbunderwiseundersphereundercanopyuplandsubtunicundermarginunderbodysubterrainambit

Word Forms

Usage Notes

Choose a synonym only when it preserves the intended meaning, tone, and grammar of the full sentence.

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Frequently Asked Questions

What does umbra mean?

Umbra means The fully shaded inner region of a shadow cast by an opaque object..

What is a synonym for umbra?

The closest synonym depends on the sentence and intended sense.

What is the opposite of umbra?

The opposite depends on the specific sense.

How do you use umbra in a sentence?

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.

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.