(healthcare) The medical attention that a patient receives upon first contact with a healthcare system; either a general practitioner or the A&E or ER department of a hospital.

(chemistry) An amine, containing a single radical, of general formula R-NH₂

(chemistry) any compound of general formula R-PH₂

(scholarly studies) An original work, especially one by a notable author whose work is now the subject of commentaries (secondary sources).

(finance) The part of the financial markets that deals with the issuance of new securities.

Research that involves the collection of previously ungathered data, rather than the analysis of that which is already available.

(algebra, ring theory) Given a commutative ring R, any ideal I such that for any a,b ∈ R, if ab ∈ I then either b ∈ I or aⁿ ∈ I for some integer n > 0.

plural of primary ideal

(medicine) Incurable myeloid tumor entity that goes along with progressive non-clonal fibrosis of the bone marrow.

Synonym of primary care.