| circular s. |
the venous ring around the hypophysis formed by the two cavernous and the anterior and posterior intercavernous sinuses; called also Ridley's s.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| circular s. of insula |
a fissure that almost surrounds the insula (lobus insularis) and separates it from the opercula.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| circular s. of tympanic membrane |
s. circulare membranae tympanicae.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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