enchiridion
enchiridion[ˌɛnkʌɪˈrɪdɪən](pl. enchiridions 或 enchiridia -dɪə)- (formal)a book containing essential information on a subject
(正式)手册,指南
语源- late Middle English: via late Latin from Greek enkheiridion, from en- 'within' + kheir 'hand' + the diminutive suffix -idion
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