fen 1
/fen/ , n.
1. low land covered wholly or partially with water; boggy land; a marsh.
2. the Fens , a marshy region W and S of The Wash, in E England.
[ bef. 900; ME, OE; c. ON fen quagmire, Goth fani mud, D ven, G Fenn fen, bog ]
fen 2
/fen/ , n. , pl. fen .
an aluminum coin and monetary unit of the People's Republic of China, the hundredth part of a yuan or the tenth part of a jiao.
[ 1905-10; fen ]