microcharacter

From micro- (“revealed by microscopic examination”) +‎ character (“a distinguishing feature of a taxon”).

• (Received Pronunciation) IPA^(key): /ˈmaɪkɹəʊˌkæɹəktə/
• (ga) IPA^(key): /ˈmaɪkɹoʊˌkɛɹəktɚ/

microcharacter (plural microcharacters)

1. (biology) A character, or distinguishing trait, observable via microscopy.
   • 1980, Derek A. Reid, A monograph of the Australian species of Amanita Pers. ex. Hook:

     The most important microcharacters involve spore size and shape and whether the spores are amyloid or non-amyloid, that is whether or not they turn blue in Melzer’s solution.

• macrocharacter