perpendicular plate

noun
per·​pen·​dic·​u·​lar plate | \ ˌpər-pən-ˈdik-yə-lər- How to pronounce perpendicular plate (audio) \

Medical Definition of perpendicular plate

1 : a flattened bony lamina of the ethmoid bone that is the largest bony part assisting in forming the nasal septum
2 : a long thin vertical bony plate forming part of the palatine bone — compare horizontal plate

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