tonsillar sinus


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ton·sil·lar fos·sa

[TA]
the depression between the palatoglossal and palatopharyngeal arches occupied by the palatine tonsil.

ton·sil·lar si·nus

(tonsi-lăr sīnŭs)
The depression between the palatoglossal and palato-pharyngeal arches, occupied by the palatine tonsil
Synonym(s): tonsillar fossa.

ton·sil·lar fos·sa

(ton'si-lăr fos'ă) [TA]
Depression between palatoglossal and palatopharyngeal arches occupied by palatine tonsil.
Synonym(s): amygdaloid fossa, tonsillar sinus.