strakes

noun

1. 1.An iron fitting of a medieval cart wheel.
2. 2.A type of aerodynamic surface mounted on an aircraft fuselage to fine-tune the airflow.
3. 3.A continuous line of plates or planks running from bow to stern that contributes to a vessel's skin. (FM 55-501).
4. 4.A shaped piece of wood used to level a bed or contour the shape of a mould, as for a bell
5. 5.A trough for washing broken ore, gravel, or sand; a launder.