semicircular canal
noun/ˌsemiˌsɜːkjələ kəˈnæl/
/ˌsemiˌsɜːrkjələr kəˈnæl/, /ˌsemaɪˌsɜːrkjələr kəˈnæl/
[usually plural] (anatomy)- any of three semicircular tubes in the inner ear that are filled with liquid and are connected together. The semicircular canals are important for the body’s balance.
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semicircular canal