| albatross | (noun) large web-footed birds of the Southern Hemisphere having long narrow wings; noted for powerful gliding flight | Synonyms: mollymawk |
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| (noun) (figurative) something that hinders or handicaps | Synonyms: millstone |
| crisscross | (noun) a marking that consists of lines that cross each other | Synonyms: cross, mark |
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| cross | (noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids | Synonyms: crossbreeding, crossing, hybridisation, hybridization, hybridizing, interbreeding |
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| (noun) (genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species | Synonyms: crossbreed, hybrid |
| (noun) a wooden structure consisting of an upright post with a transverse piece | - |
| (noun) a marking that consists of lines that cross each other | Synonyms: crisscross, mark |
| (noun) any affliction that causes great suffering | Synonyms: crown of thorns |
| dross | (noun) the scum formed by oxidation at the surface of molten metals | Synonyms: scoria, slag |
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| (noun) worthless or dangerous material that should be removed | Synonyms: impurity |
| gross | (noun) the entire amount of income before any deductions are made | Synonyms: receipts, revenue |
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| (noun) twelve dozen | Synonyms: 144 |
| testcross | (noun) a cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspring | Synonyms: test-cross |
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