1. (v. t.) To examine, to search through; to explore; as a wound or ulcer, with a probe\.

2. (v. t.) Fig.: to search to the bottom; to scrutinize or examine thoroughly.

3. (n.) An instrument for examining the depth or other circumstances of a wound, ulcer, or cavity, or the direction of a sinus, of for exploring for bullets, for stones in the bladder, etc.

ATDA ATS Alouette Anna Apollo Ariel Atlas-Score Biosatellite Comsat Cosmos Courier Diapason Discoverer ERS Early Bird Echo Elektron Explorer GATV Gemini Injun Intelsat LPN Lofti Luna Lunar Orbiter Lunik Mariner Mars probes Mercury Midas Nimbus OAO OGO OSO Pageos Pegasus Pioneer Proton RN Ranger Relay Samos San Marco Secor Sputnik Surveyor Syncom Telstar Transit Vanguard Viking Voskhod WRESAT Zond amassing evidence appraise appreciate artificial satellite artificial satellites assay assess barometer calculate calibrate caliper charge nurse check a parameter close inquiry communications satellite compute delve into delving department of investigation detection detective work dial dig dig into district nurse divide domiciliary visit dragnet enquiry estimate evaluate examination examine exhaustive study exploration explore fathom feel out feeler fly a kite forage frisk gauge geo probe geodetic satellite geophysical satellite go go into graduate graduate nurse hearing house-search hunt hunting indagate indagation inquest inquiry inquisition instrument carrier investigate investigation investigative bureau legislative investigation legwork licensed practical nurse look into measure mensurate mete meter navigational satellite nurse nursing sister pace peer into perquisition perscrutation pilot balloon plumb poke poke around poke into posse practical nurse private-duty nurse prize probationer probationist probing prod pry into public health nurse quantify quantize quest random sample ransacking rate read reconnoiter registered nurse registering rocket research research rocket research satellite robot satellite rummage sample satellite school nurse scrub nurse scrutinize scrutiny search search into search party search warrant search-and-destroy operation searching sift sifting sister size size up sleuthing sound sound out sounder space probe space satellite spacecraft span sputnik stalk stalking step still hunt straw vote student nurse study surgical nurse survey take a reading test rocket trained nurse trial balloon triangulate turning over unmanned satellite valuate value visiting nurse weather satellite weather vane weathercock weigh witch-hunt