Words in english starting with O

• opalise — Verb – English ～ replace or convert into opal; "opalized tree trunks"
• opalise — Verb – English ～ make opalescent
• opalize — Verb – English ～ make opalescent
• opalize — Verb – English ～ replace or convert into opal; "opalized tree trunks"
• opaque gem — Noun – English ～ a gemstone that is opaque
• opaque — Adjective – English ～ hard or impossible to understand
• opaque — Adjective – English ～ not transmitting or reflecting light or radiant energy; impenetrable to sight; "opaque windows of the jail"; "opaque to X-rays"
• opaquely — Adverb – English ～ in an opaque manner; "he referred opaquely to her recent past"
• opaqueness — Noun – English ～ the quality of being opaque to a degree; the degree to which something reduces the passage of light
• opaqueness — Noun – English ～ incomprehensibility resulting from obscurity of meaning
• opcw — Noun – English ～ international organization for chemical disarmament; administers the Chemical Weapons Convention
• opec — Noun – English ～ an organization of countries formed in 1961 to agree on a common policy for the production and sale of petroleum
• opel — Noun – English ～ German industrialist who was the first in Germany to use an assembly line in manufacturing automobiles (1871-1948)
• open fireplace — Noun – English ～ an open recess in a wall at the base of a chimney where a fire can be built; "the fireplace was so large you could walk inside it"; "he laid a fire in the hearth and lit it"; "the hearth was black with the charcoal of many fires"
• open door — Noun – English ～ the policy of granting equal trade opportunities to all countries
• open air — Noun – English ～ where the air is unconfined; "he wanted to get outdoors a little"; "the concert was held in the open air"; "camping in the open"
• open-hearth furnace — Noun – English ～ a furnace for making steel in which the steel is placed on a shallow hearth and flames of burning gas and hot air play over it
• open marriage — Noun – English ～ a marriage in which each partner is free to enter into extraneous sexual relationships without guilt or jealousy from the other
• open-end credit — Noun – English ～ a consumer credit line that can be used up to a certain limit or paid down at any time
• open circuit — Noun – English ～ an incomplete electrical circuit in which no current flows

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