ˌ ̷ ̷(ˌ) ̷ ̷əˈtā(ˌ)lēz noun plural
Usage: capitalized
Etymology: New Latin, from Isoetes + -ales
: an order of plants that is assigned to the class Lycopodineae or occasionally to the class Filicineae, is known to have existed since the Cenozoic, and comprises Isoetes and possibly various extinct genera