half-moon

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half-moon

A child points at the half-moon in the clear night sky.

Definition
  1. Noun:
    • A lunar phase: "half-moon" refers to the time when the Moon appears as a semicircle, with exactly half of its visible face illuminated by the Sun. This occurs at the first quarter and last quarter phases of the Moon's cycle.
    • A fingernail feature: "half-moon" also refers to the pale, whitish, crescent-shaped area at the base of a human fingernail or toenail.
Usage Examples
  • Noun (Lunar Phase):
    • We went for a walk under the bright half-moon.
    • The calendar marks the next half-moon for next Tuesday.
  • Noun (Fingernail Feature):
    • The doctor checked the color of the half-moons on her fingernails.
    • A healthy half-moon is usually visible on the thumbnail.
Advanced Usage
  • "a half-moon shape": describing any object or form that resembles a crescent or a semicircle.
    • The patio was designed in a half-moon shape.
Variants and Related Words
  • Lunula (n): The technical, anatomical term for the whitish area at the base of a nail.
  • Crescent (n): A shape resembling the curved sickle shape of the waxing or waning moon, often used interchangeably in general contexts, though a true half-moon is a semicircle, not a thin crescent.
Synonyms
  • First quarter moon: Specifically for the half-moon phase after the new moon.
  • Last quarter moon: Specifically for the half-moon phase before the new moon.
Related Idioms
  • (No common idioms use "half-moon" as a standalone term. It is typically used literally.)
half-moon

A child points at the half-moon in the clear night sky.

Noun
  1. the time at which the Moon is at first or last quarter when half its face is illuminated
  2. the crescent-shaped area at the base of the human fingernail

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