subcostalis

noun
sub·​cos·​ta·​lis | \ ˌsəb-käs-ˈtā-ləs How to pronounce subcostalis (audio) \
plural subcostales\ -​ˌlēz How to pronounce subcostales (audio) \

Medical Definition of subcostalis

: any of a variable number of small muscles that arise on the inner surface of a rib, are inserted into the inner surface of the second or third rib below, and probably function to draw adjacent ribs together

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