1) They speculate that virgo grew from virga meaning "a green branch or twig.

2) Catherine Virga, senior base metals analyst with CPM Group in New York, said pessimistic economic data continued to keep copper prices skewed to the downside.

3) Short-covering and technical buying up through previous market highs seen fueling the rally - CPM Group analyst Catherine Virga.

4) When a cloud starts producing rain or snow, but none of it reaches the ground, the result is a virga. Because trails hang down from a clumpy cloud, virgas are known as jellyfish tails.

5) "We have definitely seen some increases in mine production through increases in capacity utilization," Catherine Virga, senior base metals analyst with CPM Group in New York, said.