dpt vaccine
- n abbreviation for combination vaccine against diphtheria and pertussis (whooping cough) and tetanus toxoids; usually given in a series of injections in early childhood
downtime
- n a period of time when something (as a machine or factory) is not operating (especially as a result of malfunctions)
downturn
- n a worsening of business or economic activity
the market took a downturn
downy ash
- n smallish American tree with velvety branchlets and lower leaf surfaces