angle of aperture , angular aperture
角孔径：在能通入显微镜物镜的最大散光束间发光点处所成的角度
cloacal aperture
泄殖孔：脊椎动物如鸟类、蛇类、鱼类和两栖类泄殖腔在后方体表的开口；又称vent
external aperture of aqueduct of vestibule
前庭导水管外口：同apertura externa aqueductus vestibuli
external aperture of canaliculus of cochleā
蜗小管外口：同apertura externa canaticuli cochleae
external aperture of tympanic canaliculus
鼓小管外口：同apertura inferior canaliculi tympanic
aperture of frontal sinus
额窦孔：同apertura sinus frontalis
aperture of glottis
声门孔：同rima glottidis
inferior aperture of minor pelvis
小骨盆下口：同ap-ertura pelvis inferior
inferior aperture of thorax
胸廓下口：同apertura thoracis inferior
inferior aperture of tympanic canaliculus
鼓小管下口：同apertura inferior canaliculi tympanici
internal aperture of tympanic canaliculus
鼓小管内口：同apertura superior canaliculi tympanici
aperture of larynx
喉孔：同aditus laryngis
lateral aperture of fourth ventricle
第四脑室外侧孔：同apertura lateralis ventriculi quarti
aperture of lens
透镜角孔径，角孔径：同angle of aperture
median aperture of fourth ventricle
第四脑室内侧孔：同apertura mediana ventriculi quarti
nasal aperture , bony anterior
骨性前鼻孔：同apertura piriformis
numerical aperture
数值孔径，数值口径，光口：显微镜物镜效能的度量，为1／2角孔径的正弦乘以接物镜与标本间介质最低折射指数的乘积。常缩写成N.A.
orbital aperture
眶孔：同aditus orbitae
piriform aperture
梨状孔：同apertura piriformis
aperture of sphenoid sinus
蝶窦孔：同apertura sinus sphenoidalis
spinal aperture
椎孔：同foramen vertebrale
spurious aperture of facial canal
面神经管假孔：即岩大神经裂管。同hiatus canalis nervi petrosi majoris
spurious aperture of fallopian canal
面神经管假孔：即岩大神经裂管。同hiatus canalis nervi petrosi majoris
superior and inferior a's of axillary fossa
腋窝上、下口：同aperturae superior et inferior fossae axillaris
superior aperture of minor pelvis
小骨盆上口：同ap-ertura pelvis superior
superior aperture of thorax
胸廓上口：同apertura th-oracis superior
superior aperture of tympanic canaliculus
鼓小管上口：同apertura superior canaliculi tympanici
thoracic aperture , inferior
胸廓下口：同apertura thoracis inferior
thoracic aperture superior
胸廓上口：同apertura thoracis superior
tympanic aperture of canaliculus of chorda tympani
鼓索小管鼓室口，鼓索入口：同apertura tympanica canaliculi chordae tympani