| Meaning |
Explication |
As a source |
As a target |
Taxon |
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| <office> |
organization or its division |
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| <orthopteran> |
any of many insects of the order Orthoptera |
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| oak |
deciduous tree with distinctive deeply lobed leaves, acorns, and notably strong wood, typically of England and northeastern North America, included in genus Quercus. |
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| oar |
type of lever used to propel a boat, having a flat blade at one end and a handle at the other, and pivoted in a rowlock atop the gunwale, whereby a rower seated in the boat and pulling the handle can pass the blade through the water by repeated strokes against the water's resistance, thus moving the boat |
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| oat |
widely cultivated cereal grass, typically Avena sativa |
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| oath |
solemn pledge or promise that invokes a deity, a ruler, or another entity (not necessarily present) to attest the truth of a statement or sincerity of one's desire to fulfill a contract or promise |
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| obedient |
willing to comply with the commands, orders, or instructions of those in authority |
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| object |
None
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| objection, contradiction |
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| obscene |
inappropriate, contrary to the rules of decency, offensive to standards of decency or morality |
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| observer |
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| obsidian |
naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth |
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| obstacle |
something that impedes progress or achievement (Merriam-Webster) |
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| obstinate, persistent |
None
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| ocean |
one of the large bodies of water separating the continents |
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| ocean sunfish (Mola mola) |
large, heavy species of bony fish, Mola mola, native to tropical and temperate waters around the world |
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| ochre |
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| October |
tenth month of the Gregorian calendar, following September and preceding November |
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| odd (of numbers) |
not divisible by two without leaving a remainder |
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| oesophagus |
tube that carries food from the pharynx to the stomach |
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| of high degree (about pain) |
None
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| of high rank |
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| of low rank |
None
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| offer, proposal |
something which is proposed, or offered for consideration or acceptance |
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| official (n.) |
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| offspring |
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| often |
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| oil (food) |
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| oil slick |
droplet of oil on the surface of the broth
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| ointment |
(medicine) A viscous preparation of oils and/or fats, usually containing medication, used as a treatment or as an emollient |
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| OK |
expression used to indicate acceptance
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| old (vs. new) |
existing, created a long time ago |
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| old (vs. young) |
having lived for most of the expected years |
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| old man |
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| old man/grandfather |
old man and grandfather |
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| old woman |
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| oleander |
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| olive (Olea europaea) |
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| omasum |
the third compartment of the stomach of a ruminant
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| omen |
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| on the outside |
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| once |
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| one hundred thousand |
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| one's own |
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| one, single |
None
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| onion |
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| only |
None
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| open (adj.) |
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| open-eyed |
with open eyes |
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| opening of a sack |
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| opening, hole |
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| operculum of a snail |
anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also in a few groups of land snails |
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| Ophiuchus (Constellation) |
zodiacal constellation of the northern summer said to depict a man holding a serpent |
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| opilione, daddy longlegs |
any species of non-venomous arachnids with often very long legs (Opiliones) |
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| opinion |
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| opossum |
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| opportunity |
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| opposite (space) |
located directly across from something else, or from each other |
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| orange (color) |
colour of a ripe fruit of an orange tree, midway between red and yellow |
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| orange (plant) |
an evergreen tree of the genus Citrus such as Citrus sinensis and fruit of this tree |
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| orator |
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| order |
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| ordinary |
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| oregano |
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| organ (anatomy) |
larger part of an organism, composed of tissues that perform similar functions |
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| origin |
None
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| original (of a document) |
None
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| Orion's Belt |
bright asterism located near the celestial equator, consisting of three bright stars lined up and visibly close together |
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| orphan |
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| osprey (Pandion haliaёtus) |
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| ostrich |
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| other |
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| other`s |
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| otter (Lutra lutra) |
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| outbuilding |
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| outcast |
one that has been excluded from a society or system, a pariah |
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| outwards |
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| ovary |
one of the typically paired essential female reproductive organs that produce eggs and in vertebrates female sex hormones |
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| oven |
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| overcoat |
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| owl |
any of various birds of prey of the order Strigiformes, families Strigidae and Tytonidae, that are primarily nocturnal and have forward-looking, binocular vision, limited eye movement, and good hearing |
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| owner |
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| owner (female) |
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| owre, buffalo (Bubalus bubalis) |
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| ox |
adult castrated male of cattle (B. taurus), especially when used as a beast of burden |
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