seminal groove

Also known as the sulcus spermaticus, a lengthwise groove along the penis that transfers semen during ejaculation. The groove is effectively sealed into a tube due to erectile swelling, and may appear as a sort of "seam" along the erect penis. Depending on the species, it may be straight or helical in shape.

Typically found in non-mammalian penises, such as hemipenes and crocodilian_penis, in place of a urethra.

See also:

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