either of two keellike projections extending lengthwise along a ship's bilge, one on each side, to retard rolling.
- Also called bilge piece .
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British Dictionary definitions for bilge keel
one of two keel-like projections along the bilges of some vessels to improve sideways stability
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012