1) Annulate 2) Annulated 3) Circinate 4) Circular 5) Doughnut-shaped 6) Forming a ring 7) Having rings 8) Having the form of a ring 9) Kind of eclipse 10) Ring-shaped 11) Ringed 12) Ringlike 13) Round 14) Rounded 15) Shaped like a ring 16) Shaped like Cheerios 1) Annulate 2) Annulated 3) Circinate 4) Ringed 5) Rounded 
arranged in or forming a ring
ring forming or in rings
• (a.) Pertaining to, or having the form of, a ring; forming a ring; ringed; ring-shaped; as, annular fibers. • (a.) Banded or marked with circles.
Pertaining to, or having the form of a ring.
in the form of a ring
<dermatology> Arranged in or forming a ring. ... (09 Oct 1997) ... 
(an´u-lәr) ring-shaped.
in the form of a ring
Ring-shaped
An'nu·lar adjective [ Latin annularis , from annulis ring: confer French annulaire .] 1. Pertaining to, or having the form of, a ring; forming a ring; ringed; ring-shaped; as, annular fibers. 2. Banded or marked with circles. Annular eclipse (...
Ring-shaped
Type: Term Pronunciation: an′yū-lăr Synonyms: anular
ring forming or in rings
[adj] - shaped like a ring
lesions grouped in a circle. 
annulate adjective shaped like a ring
Ring-shaped. The annular area of a piston is the area on the rod side of a cylinder not occupied by the rod.
Ring-shaped.
Shaped like or forming a ring.
having the form of a ring. · (of a carpenter's nail) having a series of concentric grooves to improve holding power.