explorer

Etymology

explore + -er.

noun

1. One who explores something
2. A person who by means of travel (notably an expedition) searches out new information.
   Though now extinct, the rachni once threatened every species in Citadel space. Over 2000 years ago, explorers foolishly opened a mass relay to a previously-unknown system and encountered something never seen before or since: a species of spacefaring insects guided by a hive-mind intelligence. 2008, BioWare, Mass Effect, Redwood City: Electronic Arts, →OCLC, PC, scene: Rachni Codex entry
3. Any of various hand tools, with sharp points, used in dentistry.
4. (computing, graphical user interface) A visual representation of a file system etc. through which the user can navigate.
   For example, Vista includes a document explorer that shows just the documents in a location without considering all of the other files that might appear there. 2007, Mark Minasi, John Paul Mueller, Mastering Windows Vista Business: Ultimate, Business, and Enterprise