Indexer

Part of speech: noun

Definitions

1. A specialist or software that compiles and organizes a searchable list of data for efficient retrieval
2. An entity that arranges data or information into a structured list for quick access
3. A tool or individual responsible for compiling references or keywords systematically to improve search results

Etymology: Before "indexer" named a person, the Latin "index" was a plain tool-word meaning "informer" or "forefinger," built from "in-" and "dicere," to point out or declare. English took "index" in the sense of a pointer or table of contents, and the agent ending "-er" was added to it to create a name for the person or device doing the indexing. The "-er" suffix traces back through Old French to Latin "-arius," which marked a worker or official, and through Old English and Middle English to its present form. The noun is therefore a straightforward compound of an English word and a long-standing suffix, and its modern sense, a tool or person who compiles keywords to help search systems find material, extends the older idea of building an ordered list of entries. The meaning shifted from the printed book index to the digital one without changing its basic shape: something that points the reader or machine toward the right place.

Synonyms: cataloger, organizer