, -cas for 1, 2. | 1. | spike 2 . |
| 2. | a type of bandage in the shape of a figure eight, extending from an extremity to the trunk. |
| 3. | (initial capital letter ) Astronomy. a first-magnitude star in the constellation Virgo. |
Spica
brightest star in the zodiacal constellation Virgo and one of the 15 brightest in the entire sky, having an apparent visual magnitude of 0.98. It is a bluish star; spectroscopic examination reveals Spica to be a binary with a four-day period, its two components being of the first and third magnitudes, respectively. Spica lies about 260 light-years from the Earth
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