cutting edge, at the
Also, on the cutting edge. In the forefront, in a position of greatest advantage or importance. For example, In my youth I was at the cutting edge of medical research, or Our company is on the cutting edge of gene therapy. This metaphoric phrase alludes to the sharp edge of a knife or other cutting tool. [c. 1950]
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
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