/ ˈglɒsəri; NAmE ˈglɔːs-; ˈglɑːs-/ noun
( pl. -ies ) a list of technical or special words, especially those in a particular text, explaining their meanings
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WORD ORIGIN
late Middle English : from Latin glossarium , from glossa explanation of a difficult word, from Greek glōssa word needing explanation, language, tongue.