(ˌ)sīˌathēˈasēˌē noun plural
Usage: capitalized
Etymology: New Latin, from Cyathea, type genus + -aceae
: a family of tropical tree ferns having the sporangia crowded, stalked, and either naked or more often with a cup-shaped indusium — compare silver tree fern
• cy·ath·e·a·ceous (ˈ)sī|athē|āshəs adjective