| 1 | An irregularity in the force or rhythm of the heartbeat. | |
| 2 | When a surface is perpendicular to the rays, their intensity is at its maximum. | |
| 3 | "Gradually increasing in volume, force, or intensity. " | |
| 4 | An instrument for measuring a property of light, especially luminous intensity or flux. | |
| 5 | What the plumes lacked in strength, however, they made up for in number. |