extremely important and necessary

plural of essential oil

Any salt produced from the juices of plants by crystallization.

plural of essential salt

Alternative spelling of nonessential.

a worker who is considered crucial to a particular sector / a worker considered necessary for the community at large; especially first responders, other medical, education and transport personnel.

A volatile oil, used to make perfumes and flavourings, especially one having the characteristic odour of the plant from which it is obtained.

(nutrition) A compound that must be obtained from food for survival

(medicine) a rare chronic blood disorder characterised by the overproduction of platelets by megakaryocytes in the bone marrow

(medicine, chiefly uncountable) A neurological condition that causes rhythmic shaking of unknown cause in one or more parts of the body during voluntary movements.