Words in english starting with O

• order Exocycloida — Noun – English ～ flat sea urchins
• order Lichenales — Noun – English ～ category used especially in former classifications for organisms now constituting the division Lichenes
• order — Noun – English ～ a condition of regular or proper arrangement; "he put his desk in order"; "the machine is now in working order"
• order Mucorales — Noun – English ～ an order of mostly saprophytic fungi
• order book — Noun – English ～ a printed copy of the order of the day
• order Anguilliformes — Noun – English ～ elongate fishes with pelvic fins and girdle absent or reduced
• order Commelinales — Noun – English ～ an order of monocotyledonous herbs
• order Cycadales — Noun – English ～ primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms
• order Coniferales — Noun – English ～ profusely branching and chiefly evergreen trees and some shrubs having narrow or needlelike leaves
• order Mysidacea — Noun – English ～ opossum shrimp
• order Amoebina — Noun – English ～ the animal order including amoebas
• order Dicranales — Noun – English ～ widely distributed order of mosses with erect gametophores and sporophytes at the tips of stems
• order Opuntiales — Noun – English ～ coextensive with the family Cactaceae: cactuses
• order Ephemeroptera — Noun – English ～ mayflies
• order Mycrosporidia — Noun – English ～ an order in the subclass Cnidosporidia
• order Mecoptera — Noun – English ～ an order of carnivorous insects usually having long membranous wings and long beaklike heads with chewing mouths at the tip
• order Anura — Noun – English ～ frogs, toads, tree toads
• order Notostraca — Noun – English ～ small freshwater crustaceans with a shield-shaped carapace
• order Marattiales — Noun – English ～ lower ferns coextensive with the family Marattiaceae
• order Myrtales — Noun – English ～ Myrtaceae; Combretaceae; Elaeagnaceae; Haloragidaceae; Melastomaceae; Lecythidaceae; Lythraceae; Rhizophoraceae; Onagraceae; Lecythidaceae; Punicaceae

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