any igniter that is used to initiate the burning of a propellant | (baseball) a fly ball hit a short distance into the outfield |
a friction match with a large head that will stay alight in the wind | a short forward pass to a back who is running toward the sidelines |
a colored flare used as a warning signal by trucks and trains | a device that produces a bright light for warning or illumination or identification |
a spirally grooved spindle in a clock that counteracts the diminishing power of the uncoiling mainspring | a burst of light used to communicate or illuminate |
| a sudden outburst of emotion |
| a sudden eruption of intense high-energy radiation from the sun's surface; associated with sunspots and radio interference |
| an unwanted reflection in an optical system (or the fogging of an image that is caused by such a reflection) |
| a sudden burst of flame |
| a shape that spreads outward |
| reddening of the skin spreading outward from a focus of infection or irritation |
| a sudden recurrence or worsening of symptoms |