ˌ ̷ ̷ ̷ ̷səˈkäptərə noun plural
Usage: capitalized
Etymology: New Latin, probably from mega- + Greek sēkos pen, fold, trunk of a tree + New Latin -ptera
: an order of extinct insects of the Upper Carboniferous and Permian that are related to the mayflies and dragonflies and have extremely long cerci