[1] : The Collaborative International Dictionary of English v.0.48

side-slip \side"-slip`\, v. i.
   see skid, below.
   webster 1913 suppl.
see also:
skid 

[2] : WordNet (r) 2.0

side-slip
     v : slide sideways through the air in a downward direction in an
         airplane along an inclined lateral axis

[3] : WordNet (r) 2.0

sideslip
     n 1: an unexpected slide syn: skid, slip
     2: a flight maneuver; aircraft slides sideways in the air syn:
         slip
     also: sideslipping, sideslipped
see also:
skid slip sideslipping sideslipped 

Sideslip >> S Words
Sideslip, definition of term: Sideslip
sideslip_pag1.html