Plica semilunaris | definition of plica semilunaris by Medical dictionary
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sem·i·lu·nar fold [TA]
inconsistent curved fold connecting the palatoglossal and palatopharyngeal arches above the supratonsillar fossa; when present, it always contains lymphoid tissue.
A crescent-shaped fold of conjunctiva located at the inner canthus lateral to the caruncle. It is a vestigial structure that represents the third eyelid or nictitating membrane of lower vertebrates. Syn. plica lunata; semilunar fold.
References in periodicals archive
5 mm posterior to the medial commissure at the junction between the caruncle and plica semilunaris
The tumour was most commonly found in the bulbar conjunctiva (79%), caruncle (18%), or plica semilunaris
The plica semilunaris
and caruncle are also considered to be part of the conjunctiva.
In humans, a vestigial remnant of the nictitating membrane is the plica semilunaris
on the inside corner of the eye.
The conjunctiva con-sists of stratified nonkeratinizing squamous epithe-lium that is intersepted with mucous-containing gob-let cells, which are most common in the fornices and plica semilunaris