First-quarter definition

The time of month between new moon and first half-moon.
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(astronomy) The waxing lunar phase, from new moon to half way between new moon and full moon.
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The phase of the moon after the waxing crescent when only the right half of its face, when viewed from the Northern Hemisphere, reflects sunlight to the earth.
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Other Word Forms

Noun

Singular:
first-quarter
Plural:
first quarters

First-quarter Sentence Examples

  • The general coincidence of the Sabbath or seventh day with the easily recognized first quarter and full moon established its sacred character as lunar as well as planetary.

  • But by the end of the first quarter of the 13th century B.C. Egypt had recovered its province (precise boundary uncertain), leaving its rivals in possession of Syria.

  • Before the close of the 18th century, and during the first quarter of the 19th, a good deal had been done in the way of draining the land, either by open ditches or by James Elkington's system of deep covered drains.

  • That empire had been founded by Jenghiz Khan in the first quarter of the century; it stretched from Peking on the east to the Euphrates and the Dnieper on the west.

  • Particularly in the first quarter of the 14th century, writers were busy in explaining the causes of the failures of past Crusades, and in laying down the lines along which a new Crusade must proceed.

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Words near first-quarter in the Dictionary