我是線上《牛津詞典》專業版 (Oxford Dictionaries Pro) 的訂戶，最近注意到網站發布了最新一季的新詞。這一季的新詞共有 45 個，我分批介紹，並加註了自己的翻譯和眉批，附上詞典所提供的例句一條和詞源 (若有)，以饗格友。
前六批 (之一～之六) 介紹了按字母順序的頭 30 個，這次介紹第七批再次的 5 個。請注意，這裡的《牛津詞典》不是史上最大的《牛津英語詞典》(The Oxford English Dictionary)，而是以《英語牛津詞典》(Oxford Dictionary of English) 為骨幹，兼納《新牛津美國詞典》(New Oxford American Dictionary) 數位化而成。名字過份類似，的確令人混淆。
31. mathlete /ˈmaθliːt/ (參加數學競賽的) 數學選手 noun
定義：a person who takes part in a mathematics competition, typically one organized for schoolchildren.
例句：As with other mathletes, he spends up to four hours a day on his hobby—or what he simply calls his 'calculations'.
詞源：1930s: blend of MATHEMATICS (or MATH) and ATHLETE
32. metamaterial /ˈmɛtəməˌtɪərɪəl/ 超材料 noun Physics
定義：a synthetic composite material with a structure such that it exhibits properties not usually found in natural materials, especially a negative refractive index.
例句：The team began making these metamaterials and demonstrated several that scattered electromagnetic waves unlike any known materials.
33. microgeneration /ˌmʌɪkrə(ʊ)dʒɛnəˈreɪʃ(ə)n/ 微型發電 noun [mass noun]
定義：the generation of electricity or heat on a small scale, typically for domestic use and by methods that do not contribute to the depletion of natural resources, such as solar panels.
例句：It was good news to hear that new buildings will have to cover 15% of their carbon emission through design and microgeneration.
衍生詞：microgenerate 微型發電 verb
34. petrichor /ˈpɛtrʌɪkɔː/ 雨後泥土香 noun [mass noun]
定義：a pleasant smell that frequently accompanies the first rain after a long period of warm, dry weather.
例句：Other than the petrichor emanating from the rapidly drying grass, there was not a trace of evidence that it had rained at all.
詞源：1960s: blend of PETRO- 'relating to rocks' (the smell is believed to be caused by a liquid mixture of organic compounds which collects in the ground) and ICHOR "希臘神祇血管中的靈液"
35. SAHM 家庭主婦 abbreviation
定義：stay-at-home mom (or mother).
例句：My own mother was a SAHM and I love her for it.