Nouns in english starting with O

• oceanic abyss — Noun – English ～ a long steep-sided depression in the ocean floor
• oceanica — Noun – English ～ a large group of islands in the south Pacific including Melanesia and Micronesia and Polynesia (and sometimes Australasia and the Malay Archipelago)
• Oceanid — Noun – English ～ (Greek mythology) sea nymph who was a daughter of Oceanus and Tethys
• Oceanites oceanicus — Noun – English ～ medium-sized storm petrel
• Oceanites — Noun – English ～ a genus of Hydrobatidae
• oceanographer — Noun – English ～ a scientist who studies physical and biological aspects of the seas
• oceanography — Noun – English ～ the branch of science dealing with physical and biological aspects of the oceans
• oceanology — Noun – English ～ the branch of science dealing with physical and biological aspects of the oceans
• oceanus — Noun – English ～ (Greek mythology) god of the stream that flowed around the earth in ancient mythology
• ocellus — Noun – English ～ an eye having a single lens
• ocellus — Noun – English ～ an eyelike marking (as on the wings of some butterflies); usually a spot of color inside a ring of another color
• ocelot — Noun – English ～ nocturnal wildcat of Central America and South America having a dark-spotted buff-brown coat
• ocher — Noun – English ～ a moderate yellow-orange to orange color
• ocher — Noun – English ～ any of various earths containing silica and alumina and ferric oxide; used as a pigment
• ochlocracy — Noun – English ～ a political system in which a mob is the source of control; government by the masses
• ochna family — Noun – English ～ family of tropical evergreen trees and shrubs with thick shining parallel-veined leaves
• Ochna — Noun – English ～ type genus of Ochnaceae; evergreen trees and shrubs of Old World tropics
• Ochnaceae — Noun – English ～ family of tropical evergreen trees and shrubs with thick shining parallel-veined leaves
• Ochoa — Noun – English ～ United States biochemist (born in Spain) who studied the biological synthesis of nucleic acids (1905-1993)
• Ochotona collaris — Noun – English ～ similar to little chief hare and may be same species

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