ˌ ̷ ̷ ̷ ̷ˈdā(ˌ)lēz noun plural
Usage: capitalized
Etymology: New Latin, from Naiad-, Naias + -ales
: an order of aquatic monocotyledonous herbaceous plants that have flowers either with or without perianth, apocarpous ovaries, and seeds without endosperm — see hydrocharitaceae , juncaginaceae , naiadaceae