单词	ortho
释义	ortho adjective or·​tho ˈȯr-(ˌ)thō  : orthochromatic Word History First Known Use 1904, in the meaning defined above Medical Definition ortho 1 of 2 adjective or·​tho ˈȯr-(ˌ)thō  1 : derived from or being an acid in the highest hydrated or hydroxylated form known 2 : relating to, characterized by, or being two neighboring positions in the benzene ring ortho 2 of 2 adjective : orthochromatic
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