ə̇ˈtaptərə̇s, āˈ-, ēˈ- noun
Usage: capitalized
Etymology: New Latin, from Greek ēta eta + New Latin -pteris
: a form genus of Paleozoic ferns represented only by fossil leaves which are pinnate and with primary pinnal alternate on the rachis
ə̇ˈtaptərə̇s, āˈ-, ēˈ- noun
Usage: capitalized
Etymology: New Latin, from Greek ēta eta + New Latin -pteris
: a form genus of Paleozoic ferns represented only by fossil leaves which are pinnate and with primary pinnal alternate on the rachis
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012