Definition of macrocyst in US English:

macrocyst

noun

  • 1Biology. A (relatively large) encysted stage of the life cycle in a slime mould; specifically a thick-walled, multinucleate structure formed as part of the sexual cycle in certain slime moulds of the phylum Dictyostelida.

  • 2Medicine and Pathology. A macroscopic cyst; a large cyst.

  • 3Veterinary Medicine. A macroscopic sarcocyst.

Origin

Late 19th century (in an earlier sense). In sense 1 from French macrocyste from macro- + -cyste; compare paracyst.

Pronunciation

macrocyst

/ˈmakrə(ʊ)sɪst/