Words starting with O

• order Corrodentia — Noun – English ～ an order of insects: includes booklice and bark-lice
• order Accipitriformes — Noun – English ～ in some classifications an alternative name for the Falconiformes
• order Caryophyllales — Noun – English ～ corresponds approximately to the older group Centrospermae
• order Alismales — Noun – English ～ an order of aquatic monocotyledonous herbaceous plants
• order Batoidei — Noun – English ～ fish with dorsoventrally flattened bodies; includes: rays; skates; guitarfishes; sawfishes
• order Araneida — Noun – English ～ spiders
• order Dinoflagellata — Noun – English ～ in some classifications considered a phylum of the kingdom Protista; in others included in the plant phylum Pyrrophyta
• order mantophasmatodea — Noun – English ～ an order of insect identified in 2002 in a 45 million year old piece of amber from the Baltic region
• order Cydippidea — Noun – English ～ ctenophores having two long pinnate tentacles
• order Decapoda — Noun – English ～ lobsters; crayfish; crabs; shrimps; prawns
• order code — Noun – English ～ the portion of a set of operation descriptions that specifies the operation to be performed; the set of operations in a computer
• order Cydippea — Noun – English ～ ctenophores having two long pinnate tentacles
• order Chytridiales — Noun – English ～ simple aquatic fungi mostly saprophytic but some parasitic on higher plants or animals or fresh water fungi; sometimes placed in class Oomycetes
• order Orchidales — Noun – English ～ order of plants with irregular flowers having minute seeds: Orchidaceae; Burmanniaceae
• order Ophioglossales — Noun – English ～ coextensive with the family Ophioglossaceae
• order Aspergillales — Noun – English ～ order of fungi having a closed ascocarp (cleistothecium) with the asci scattered rather than gathered in a hymenium
• order — Noun – English ～ the act of putting things in a sequential arrangement; "there were mistakes in the ordering of items on the list"
• order Lepidodendrales — Noun – English ～ fossil arborescent plants arising during the early Devonian and conspicuous throughout the Carboniferous
• order Isopoda — Noun – English ～ woodlice
• order Eubryales — Noun – English ～ mosses with perennial erect gametophores and stems with rows of leaves and drooping capsules

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