ruby
Concise Oxford English Dictionary © 2008 Oxford University Press:
ruby/ˈruːbi/
▶noun (pl. rubies)
- 1 a precious stone consisting of corundum in colour varieties varying from deep crimson or purple to pale rose.
- 2 an intense deep red colour.
- 3 Printing an old type size equal to 5
points.1/ 2
– origin ME: from OFr. rubi, from med. L. rubinus, from the base of L. rubeus ‘red’.
'ruby' also found in these Oxford entries:

