| ES | absolutely necessary |
|---|---|
| ES | being or relating to or containing the essence of a plant etc |
| ES | an amino acid that is required by animals but that they cannot synthesize |
| ES | a prerequisite |
| ES | persistent and pathological high blood pressure for which no specific cause can be found |
| ES | a volatile oil having the odor or flavor of the plant from which it comes |
| ES | the primary form of thrombocytopenia (rather than a shortage of platelets caused by with other conditions such as tuberculosis or chemical suppression of bone marrow etc.) |
| ES | tremor of unknown cause (usually of the hands and head) that develops in older people |
| ES | basic importance |
| ES | at bottom or by one's (or its) very nature |
| ES | basic importance |
| ES | a county in southeastern England on the North Sea and the Thames estuary |