Actinomycetaceae
noun plural
Ac·ti·no·my·ce·ta·ce·ae
| \ -ˌmī-sə-ˈtā-sē-ˌē
\
\
Medical Definition of Actinomycetaceae
: a family of filamentous or rod-shaped bacteria of the order Actinomycetales that are often branched, sometimes produce conidia, and sometimes form a mycelium that readily breaks up into bacillary elements