| operations research | |
| —n | |
| Also: operational research the analysis of problems in business and industry involving the construction of models and the application of linear programming, critical path analysis, and other quantitative techniques | |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a chattering or flighty, light-headed person. |