英语词汇niacin的发音释义、词根词缀、结构分析、同源词、词频及词根记忆法-英语词根词缀词典

词汇	niacin
词根词缀	词源： "pellagra-preventing vitamin in enriched bread," 1942, coined from ni(cotinic) ac(id) + -in, chemical suffix; suggested by the merican Medical Association as a more commercially viable name than nicotinic acid."The new name was found to be necessary because some anti-tobacco groups warned against enriched bread because it would foster the cigarette habit." ["Cooperative Consumer," Feb. 28, 1942]
随便看	exotic expand expansion ex parte expatriate expect expectation expect of expectorate expedient expedite expedition expeditious expel expend expenditure expense expensive experience experiment experimental expert expertise expiation expiration

英语词根词缀词典收录了31503条英语词根词缀词条，基本涵盖了全部常用英语词汇的词根、词缀及词根记忆法解析，是记忆英语词汇的必备工具。