actinotrichium

noun ac·ti·no·trich·i·um \¦ak-tə-(ˌ)nō-ˈtri-kē-əm\
variants: less commonly

actinotrich

\ak-ˈti-nə-ˌtrik\

Definition of actinotrichium

plural

actinotrichia

\¦ak-tə-(ˌ)nō-ˈtri-kē-ə\ also

actinotrichs

\ak-ˈti-nə-ˌtriks\
  1. :  any of the hairy threadlike fibers in the fin fold of an embryo fish which fuse and form the base of the rays

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Origin and Etymology of actinotrichium

New Latin actinotrichium, from actin- + Greek trich-, thrix hair + New Latin -ium — more at trich-


First Known Use: 1885


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