| L ring | <microbiology> Outermost ring of the basal part of the bacterial flagellum in gram-negative bacteria. It may serve as a bush to anchor the flagellum relative to the lipopolysaccharide layer. (18 Nov 1997) |
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| lymphatic ring of cardiac part of stomach | A group of lymph nodes surrounding the cardia of the stomach. Synonym: annulus lymphaticus cardiae, cardiac lymphatic ring. (05 Mar 2000) |
| lymphoid ring | The broken ring of lymphoid tissue, formed of the lingual, faucial, and pharyngeal tonsils. Synonym: Bickel's ring, tonsillar ring, Waldeyer's throat ring. (05 Mar 2000) |