n.
Function: adjective
Date: 1802
: serving as a guiding or tracing device, an activating or auxiliary unit, or a trial apparatus or operation <a pilot study>
n.
Function: adjective
Date: 1802
: serving as a guiding or tracing device, an activating or auxiliary unit, or a trial apparatus or operation <a pilot study>
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012