tonsillar sinus

ton·sil·lar fos·sa

[TA]

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

Synonym(s): fossa tonsillaris [TA], sinus tonsillaris [TA], amygdaloid fossa, tonsillar sinus

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.