agate 的詞源

《埃涅阿斯紀》中埃涅阿斯的護甲搬運者和忠實朋友的名字； 短語 fidus Achates 成爲了“忠實的朋友，忠誠和熱心的伴侶”的諺語。這個名字來自希臘語 akhatēs “瑪瑙”（見 agate）。

玻璃彈子的一種類型，1905年起源於美國英語，是 agate（參見）的口語縮寫。

Excited groups gather about rude circles scratched in the mud, and there is talk of "pureys," and "reals," and "aggies," and "commies," and "fen dubs!" There is a rich click about the bulging pockets of the boys, and every so often in school time something drops on the floor and rolls noisily across the room. When Miss Daniels asks: "Who did that?" the boys all look so astonished. Who did what pray tell? [McClure's magazine, May 1905]

興奮的人羣聚集在泥地上劃出的粗糙圓圈周圍，談論着“pureys”、“reals”、“aggies”、“commies”和“fen dubs！”男孩們的口袋裏有豐厚的聲音，每隔一段時間在上課時間裏，有東西掉在地上，發出嘈雜的滾動聲。當丹尼爾斯小姐問：“誰幹的？”男孩們都看起來很驚訝。請問誰幹了什麼？[麥克盧爾雜誌，1905年5月]