Search Result for "esker": 
Wordnet 3.0

NOUN (1)

1. (geology) a long winding ridge of post glacial gravel and other sediment; deposited by meltwater from glaciers or ice sheets;


The Collaborative International Dictionary of English v.0.48:

Eschar \Es"char\ ([e^]s"k[~e]r or [e^]s"k[aum]r), n. [Ir.] (Geol.) In Ireland, one of the continuous mounds or ridges of gravelly and sandy drift which extend for many miles over the surface of the country, deposited by streams in meltwater channels under glaciers. Similar ridges in Scotland are called kames or kams. The spelling form esker is now the most commonly used, and the term is applied in geology to similar ridges created by glaciers anywhere in the world. Eskers vary in size and extent, but can be 100 feet high and up to 100 miles long. [Written also eskar and esker.] [1913 Webster +PJC]
The Collaborative International Dictionary of English v.0.48:

Eskar \Es"kar\, or Esker \Es"ker\ ([e^]s"k[~e]r), n. (Geol.) See Eschar. [1913 Webster]
WordNet (r) 3.0 (2006):

esker n 1: (geology) a long winding ridge of post glacial gravel and other sediment; deposited by meltwater from glaciers or ice sheets