| PAT | type genus of the family Patellidae: common European limpets |
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| PAT | a small flat triangular bone in front of the knee that protects the knee joint |
| PAT | marine limpet |
| PAT | near or relating to the patella or kneecap |
| PAT | a reflex extension of the leg resulting from a sharp tap on the patellar tendon |
| PAT | marine limpets |
| PAT | the property of being easy to see and understand |
| PAT | the openness (lack of obstruction) of a bodily passage or duct |
| PAT | a document granting an inventor sole rights to an invention |
| PAT | an official document granting a right or privilege |
| PAT | make open to sight or notice |
| PAT | obtain a patent for |