Fen (?), n. [AS. fen, fenn, marsh, mud, dirt; akin to D. veen, OFries. fenne, fene, OHG. fenna, G. fenn, Icel. fen, Goth. fani mud.]
Low land overflowed, or covered wholly or partially with water, but producing sedge, coarse grasses, or other aquatic plants; boggy land; moor; marsh.
'Mid reedy fens wide spread.
Wordsworth.
Fen is used adjectively with the sense of belonging to, or of the nature of, a fen or fens.
Fen boat, a boat of light draught used in marshes. -- Fen duck Zool., a wild duck inhabiting fens; the shoveler. [Prov. Eng.] -- Fen fowl Zool., any water fowl that frequent fens. -- Fen goose Zool., the graylag goose of Europe. [Prov. Eng.] -- Fen land, swamp land.
© Webster 1913.