umbra
pronunciation
How to pronounce umbra in British English:
UK [ˈʌmbrə]
How to pronounce umbra in American English:
US [ˈʌmbrə]
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- Noun:
- a region of complete shadow resulting from total obstruction of light
Word Origin
- umbra (n.)
- 1590s, "phantom, ghost," a figurative use from Latin umbra "shade, shadow" (see umbrage). Astronomical sense of "shadow cast by the earth or moon during an eclipse" is first recorded 1670s. Meaning "an uninvited guest accompanying an invited one" is from 1690s in English, from a secondary sense among the Romans. Related: Umbral.
Example
- 1. Umbra rain glazed pewter waste can .
- 2. Only moon umbra totally puts on earth , the shadow area can watch the eclipse .
- 3. During an average total lunar eclipse , the moon is within the earth 's umbra for about an hour . This is called totality .
- 4. Occurs when the moon is completely within the umbra shadow and takes on a reddish appearance .
- 5. When the moon enters the umbra shadow , its bright side diminishes little by little .