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Longman Dictionary English

From Longman Dictionary of Contemporary English
Related topics: Hospital
orthodonticsor‧tho‧don‧tics /ˌɔːθəˈdɒntɪks $ ˌɔːrθəˈdɑːn-/ noun [uncountable] MHthe skill or job of helping teeth to grow straight when they have not been growing correctlyGRAMMAR: Singular or plural verb?Orthodontics is followed by a singular verb: Orthodontics is a good profession. —orthodontic adjective orthodontic treatment
Origin orthodontics (1900-2000) ortho- “straight” (from Greek; → ORTHODOX) + Greek odous “tooth”
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June 10, 2025

alabaster
noun ˈæləbɑːstə
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