cryptozoon
/ˌkrɪptə(ʊ)ˈzəʊən/ /ˌkrɪptə(ʊ)ˈzəʊɒn/(also cryptozoön) Geology
noun
A supposed reef-forming fossil of Cambrian or Precambrian age having a laminated, discoid structure and subsequently shown to be the remains of colonies of cyanobacteria (stromatolites). Also (in form Cryptozoon) as a genus name.
Origin
Late 19th century. From crypto- + -zoon, after scientific Latin Cryptozoön, genus name.
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