单词	tunica
释义	tunica noun tu·​ni·​ca ˈtü-ni-kə  ˈtyü- plural tunicae ˈtü-nə-ˌkē  -ˌkī, -ˌsē, ˈtyü- : an enveloping membrane or layer of body tissue Example Sentences Recent Examples on the Web But when too much pressure is placed on the tissue, the external envelope surrounding the corpus cavernosa -- called the tunica albuginea -- can tear, causing a corporal rupture, according to Purohit. Mark Lieber, CNN, 18 Apr. 2018 Word History Etymology Latin, tunic, membrane First Known Use circa 1698, in the meaning defined above Medical Definition tunica noun tu·​ni·​ca ˈt(y)ü-ni-kə  plural tunicae -nə-ˌkē  -ˌkī  -ˌsē  : an enveloping membrane or layer of body tissue
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