- probursal
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adj. [L. pro, before; bursa, purse](PLATYHELMINTHES: Turbellaria)In Tricladida, having the bursal stalk long and arching anteriorly over the penis, so that the bursa lies anterior to the penis; see retrobursal.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.