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hematocyst

American  
[hi-mat-uh-sist, hee-muh-tuh-, hem-uh-] / hɪˈmæt əˌsɪst, ˈhi mə tə-, ˈhɛm ə- /

noun

Pathology.
  1. a cyst containing blood.


Etymology

Origin of hematocyst

First recorded in 1850–55; hemato- + -cyst