speciality
n.a subject, skill, or product that someone is an expert in or is famous for. You use this to describe the one thing a person or place does better than anything else.
n.a pursuit, area of study, or product in which someone possesses particular expertise or which is characteristic of a specific place. Often refers to a signature dish in a culinary context.
“The chef's speciality is homemade pasta.”
“While the law firm handles many cases, their true speciality is international intellectual property rights.”
“The region's primary speciality remains its hand-woven silk, a craft that has been refined over centuries and continues to drive the local export economy.”
In British English, 'speciality' is the standard form; in American English, 'specialty' is preferred.
The noun is followed directly by the subject or linked with 'in' (speciality in history), but it does not take the preposition 'on'.
From special + -ity, from Middle French spécialité, from Old French specialte, especialte, from Latin specialitas.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.