A concept has multiple associated descriptions.
Each description has a description type and a unique numeric description identifier.
Fully specified name (FSN) and synonym (SYN) are description types in SNOMED CT.
A preferred term (PT) is a synonym that has been marked as preferred in a particular dialect.
Every concept may have only one preferred term in a specific dialect. Two preferred terms for the same language may coexist if they belong to two distinct dialects (e.g. variant US and GB of English language).
|Bleeding of mouth (disorder)
|Bleeding of mouth
|Bleeding in mouth
|SYN - US English
|SYN - GB English
|Computed tomography of upper limb (procedure)
|CT of upper limb
|Computed tomography of upper limb
|Esophageal structure (body structure)
|PT - US English
|PT - GB English