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corpus spongiosum

British  
/ ˌspʌndʒɪˈəʊsəm /

noun

  1. a mass of tissue that, with the corpora cavernosa, forms the erectile tissue of the penis of mammals

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of corpus spongiosum

New Latin, literally: spongy body