corpus cavernosum
noun
corpus ca·ver·no·sum
| \ -ˌkav-ər-ˈnō-səm
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plural corpora cavernosa\ -sə
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Medical Definition of corpus cavernosum
: a mass of erectile tissue with large interspaces capable of being distended with blood
especially
: one of those that form the bulk of the body of the penis or of the clitoris