sportsherald. 2 votes Vote for this answer. Another name for a wing dam is a groyne: 'River groynes (spur dykes, wing dykes, or wing dams) are often constructed nearly perpendicular to the riverbanks, beginning at a riverbank with a root and ending at the regulation line with a head.
The foreskin (also known as the prepuce) is a portion of skin on the penis that covers and protects the tip of the penis, also known as the glans. It can be a tough world for a glans -- there's abrasion from undergarments, cold winter weather and dry air.
This is the main medical determinant for circumcision. Conversely, if a foreskin slides down from the glans but won't properly return, that's a condition known as paraphimosis. This can cause swelling of the glans and foreskin. Balanposthitis is a swelling of the mucous surfaces of the foreskin.