Annular



having the form of a ring.
(of a carpenter’s nail) having a series of concentric grooves to improve holding power.
Historical Examples

It will be seen that the valves v on the other side of the annular chamber are closed.
Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 5 Various

The angle of the anterior chamber is a true angle and not an annular sinus.
Glaucoma Various

Johnston suggests that the reference is to an annular eclipse which he finds occurred on August 14, at about 8¼ h. in the morning.
The Story of Eclipses George Chambers

Hind found that the eclipse was annular on the central line.
The Story of Eclipses George Chambers

annular bases and tripods would be of little use until level floors of unyielding material came into vogue.
Ancient art of the province of Chiriqui, Colombia William Henry Holmes

In 1748 Scotland was again favoured with a central eclipse, but it was only annular.
The Story of Eclipses George Chambers

The spool fits fairly tight upon the end of the core, and when in position rests against an annular shoulder in the recess.
Electricity for Boys J. S. Zerbe

One of the annular constrictions is constantly in the sagittal plane (separating the right and left halves of the shell).
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia) Ernst Haeckel

Stamens united into a central column, the anther solitary in our species and annular.
The Manual of the Botany of the Northern United States Asa Gray

Finally, these annular creatures, obscure in their lives, isolate themselves.
The Ocean World: Louis Figuier

adjective
ring-shaped; of or forming a ring
adj.

“ring-shaped,” 1570s, from French annulaire (16c.) or directly from Latin annularis “pertaining to a ring,” from annulus, diminutive of anus “ring” (see anus). An annular eclipse (1727) is one in which the dark body of the moon is smaller than the disk of the sun, so that at the height of it the sun appears as a ring of light. Related: Annularity.

annular an·nu·lar (ān’yə-lər)
adj.
Shaped like or forming a ring.
annular
(ān’yə-lər)
Forming or shaped like a ring.

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  • Annular clock

    a clock in the form of a vase, ball, etc., having the hours painted on a ring rotating beneath a pointer.

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    annular cataract annular cataract n. A congenital cataract in which a central white membrane replaces the nucleus.



  • Annular eclipse

    an eclipse of the sun in which a portion of its surface is visible as a ring surrounding the dark moon. Historical Examples Johnston suggests that the reference is to an annular eclipse which he finds occurred on August 14, at about 8¼ h. in the morning. The Story of Eclipses George Chambers Baron de […]

  • Annular gear

    . a gear having teeth cut on an inner cylindrical surface.



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