The Collaborative International Dictionary of English v.0.48:
Liman \Li"man\ (l[imac]"man), n. [F. limon, fr. L. limus slime.] The deposit of slime at the mouth of a river; slime. [1913 Webster]WordNet (r) 3.0 (2006):
liman n 1: a long narrow lagoon near the mouth of a river