Words in english starting with O

• opossum shrimp — Noun – English ～ shrimp-like crustaceans whose females carry eggs and young in a pouch between the legs
• open-and-shut — Adjective – English ～ so obvious as to be easily solved or decided; "an open-and-shut case"
• ozone sickness — Noun – English ～ illness that can occur to persons exposed to ozone in high-altitude aircraft; characterized by sleepiness and headache and chest pains and itchiness
• one-sided — Adjective – English ～ favoring one person or side over another; "a biased account of the trial"; "a decision that was partial to the defendant"
• one-sided — Adjective – English ～ not reversible or capable of having either side out
• one-sided — Adjective – English ～ involving only one part or side; "unilateral paralysis"; "a unilateral decision"
• one-sidedly — Adverb – English ～ in a unilateral manner; by means of one part or party; "they worked out an agreement unilaterally"
• open sight — Noun – English ～ rear gunsight having an open notch instead of a peephole or telescope
• out of sight — Adjective – English ～ not accessible to view; "concealed (or hidden) damage"; "in stormy weather the stars are out of sight"
• out of sight — Adverb – English ～ quietly in concealment; "he lay doggo"
• out of sight — Adverb – English ～ no longer visible; "the ship disappeared behind the horizon and passed out of sight"
• output signal — Noun – English ～ signal that comes out of an electronic system
• order Siluriformes — Noun – English ～ an order of fish belonging to the superorder Malacopterygii including catfishes
• original sin — Noun – English ～ a sin said to be inherited by all descendants of Adam; "Adam and Eve committed the original sin when they ate the forbidden fruit in the Garden of Eden"
• oculus sinister — Noun – English ～ the left eye
• order Siphonaptera — Noun – English ～ fleas
• order Siphonophora — Noun – English ～ marine colonial hydrozoans
• order Sirenia — Noun – English ～ an animal order including: manatees; dugongs; Steller's sea cow
• orphan site — Noun – English ～ a toxic waste area where the polluter could not be identified or the polluter refused to take action or pay for the cleanup
• on-site — Adjective – English ～ taking place or located at the site; "on-site inspection"

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