ˌmīkrəˌthīrēˈāsēˌē noun plural
Usage: capitalized
Etymology: New Latin, from Microthyrium, type genus (from micr- + Greek thyrion, diminutive of thyra door) + -aceae — more at door
: a family of ascomycetous fungi (order Microthyriales) with shield-shaped or radiate perithecia