Related Clues:

• Latin preposition
• Right-triangle reciprocal
• It may be acute
• Ratio involving a hypotenuse
• Trigonometric term
• ___ wave
• Go for fish
• Hidden motive
• Periodic function
• ___ mora (without delay, in Latin)
• Polygon corner
• Right triangle ratio
• Trig curve
• __ wave
• Drop a line from a pier, say