annular
/'ænjulə/
Definition
- Adjective:
- Shaped like a ring; ring-shaped: Describes an object or form that is circular with a hole in the center, similar to a ring, doughnut, or the band of a planet like Saturn.
Usage and Examples
- Adjective:
- The telescope revealed the planet's distinctive annular rings.
- An annular eclipse occurs when the moon is too far from Earth to completely cover the sun, leaving a "ring of fire" visible.
- The ancient artifact had an annular design, with a large circular hole in its center.
Advanced Usage
- Technical/Scientific Contexts: The term is frequently used in astronomy, geometry, biology, and engineering to describe ring-shaped structures.
- In botany, some fungi have an annular membrane on their stalk.
- The engineer designed an annular combustion chamber for the jet engine.
Variants and Related Words
- Annulus (noun): A ring-shaped object, structure, or region. This is the noun form.
- The mathematician calculated the area of the annulus.
- Annularity (noun): The state or quality of being annular; specifically, the phase of an annular solar eclipse when the "ring of fire" is visible.
- The eclipse's annularity lasted for over three minutes.
Synonyms
- Ring-shaped
- Circinate
- Circular (though "circular" can imply a solid disk, while "annular" specifically implies a ring with a central void)
Antonyms
- Solid
- Discoid (disk-shaped without a hole)
Related Phrases and Terms
- Annular Eclipse: A solar eclipse in which the moon's apparent diameter is smaller than the sun's, leaving a bright ring (annulus) of sunlight visible around the moon's dark silhouette.
- Annular Ligament: (Anatomy) A strong band of ligaments that encircles and stabilizes a bone or other structure, such as the ligament surrounding the head of the radius bone in the elbow.
Adjective
-
shaped like a ring
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