| keel | one of the main longitudinal beams (or plates) of the hull of a vessel |
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| keel | the median ridge on the breastbone of birds that fly |
| keel | walk as if unable to control one's movements |
| keel | a pointed arch having an S-shape on both sides |
| keel | turn over and fall |
| keel | river boat with a shallow draught and a keel but no sails |
| keel | having or shaped like a carina or keel |
| keel | having a ridge or shaped like a ridge or the keel of a ship |
| keel | Eurasian bulbous plant |
| keel | a longitudinal beam connected to the keel of ship to strengthen it |