| auxiliary | (adjective) functioning in a supporting capacity | Synonyms: subsidiary, supplemental, supplementary |
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| (adjective) furnishing added support | Synonyms: accessory, adjunct, adjuvant, ancillary, appurtenant |
| (noun) someone who acts as assistant | Synonyms: aide |
| auxin | (noun) a plant hormone that promotes root formation and bud growth | - |
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| auxinic | (adjective) relating to or containing auxins | - |
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| bauxite | (noun) a clay-like mineral; the chief ore of aluminum; composed of aluminum oxides and aluminum hydroxides; used as an abrasive and catalyst | - |
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| bauxitic | (adjective) resembling or containing bauxite | - |
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