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Medical Definition of Lacuna magna
1. A recess on the roof of the fossa navicularis of the penis, formed by a fold of mucous membrane, the valve of the navicular fossa. (05 Mar 2000)
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1. A recess on the roof of the fossa navicularis of the penis, formed by a fold of mucous membrane, the valve of the navicular fossa. (05 Mar 2000)