| alidad | (noun) surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles | Synonyms: alidade |
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| (noun) surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments | Synonyms: alidade |
| alidade | (noun) surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles | Synonyms: alidad |
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| (noun) surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments | Synonyms: alidad |
| chlorthalidone | (noun) a diuretic (trade names Hygroton and Thalidone) used to control hypertension and conditions that cause edema; effective in lowering blood pressure to prevent heart attacks | Synonyms: Hygroton, Thalidone |
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| halide | (noun) a salt of any halogen acid | - |
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| invalid | (noun) someone who is incapacitated by a chronic illness or injury | Synonyms: shut-in |
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| invalidation | (noun) (law) a formal termination (of a relationship or a judicial proceeding etc) | Synonyms: annulment |
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| (noun) when a person's thoughts and feelings are rejected, ignored, or judged. | - |
| invalidator | (noun) an official who can invalidate or nullify | Synonyms: nullifier, voider |
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| invalidism | (noun) chronic ill health | - |
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| invalidity | (noun) illogicality as a consequence of having a conclusion that does not follow from the premisses | Synonyms: invalidness |
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| invalidness | (noun) illogicality as a consequence of having a conclusion that does not follow from the premisses | Synonyms: invalidity |
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| nymphalid | (noun) medium to large butterflies found worldwide typically having brightly colored wings and much-reduced nonfunctional forelegs carried folded on the breast | Synonyms: brush-footed butterfly, four-footed butterfly, nymphalid butterfly |
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| pyralid | (noun) usually tropical slender-bodied long-legged moth whose larvae are crop pests | Synonyms: pyralid moth |
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| squalidness | (noun) sordid dirtiness | Synonyms: sordidness, squalor |
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| tetrahalide | (noun) any halide containing four halogen atoms in its molecules | - |
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| thalidomide | (noun) a sedative and hypnotic drug; withdrawn from sale after discovered to cause severe birth defects because it inhibits angiogenesis | - |
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| validation | (noun) the act of validating; finding or testing the truth of something | Synonyms: proof, substantiation |
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| (noun) the cognitive process of establishing a valid proof | Synonyms: establishment |
| validity | (noun) the quality of having legal force or effectiveness | Synonyms: validness |
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| (noun) the quality of being valid and rigorous | Synonyms: cogency, rigor, rigour |
| validness | (noun) the quality of having legal force or effectiveness | Synonyms: validity |
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