annulate

annulate \AN-yuh-lit, -leyt\, adjective:

1. having rings or ringlike bands.
2. formed of ringlike segments, as an annelid worm.

This may be called, for distinctness' sake, the annulate corpuscle.
-- Thomas Henry Huxley, An Introduction to the Study of Zoology, 2006

A cast-iron stove dragged its annulate pipe along the wall, then folded it into the overhead motley of the flags.
-- Vladimir Nabokov, "The Fight," 1925

Annulate entered English in the 1800s from the Latin annulus meaning "ring."