essential oil
- n an oil having the odor or flavor of the plant from which it comes; used in perfume and flavorings
essential thrombocytopenia
- n the primary form of thrombocytopenia (rather than a shortage of platelets caused by other conditions such as tuberculosis or chemical suppression of bone marrow etc.)
essential tremor
- n tremor of unknown cause (usually of the hands and head) that develops in older people; often mistaken for Parkinsonism but is not life-threatening and can usually be kept under control
essex
- n a county in southeastern England on the North Sea and the Thames estuary
est
- n standard time in the 5th time zone west of Greenwich, reckoned at the 75th meridian; used in the eastern United States