a small article the actual name of which one either does not know or cannot rememberscrew in the doohickey at the top of the lamp shade
screw in the doohickey at the top of the lamp shade
dingus, doodad, hickey, thingamabob, thingamajig(or thingumajig), thingummy, whatchamacallit, whatnot, whatsit(also whatsis or what-is-it)
in 1914
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。