D defs.my
Entry 2 senses Webster, 1913

Sliding

/slīd'-ĭng/ · Slid·ing · IPA /ˈslaɪdɪŋ/
01 a. That slides or slips; gliding; moving smoothly.
  1. 1.
    That slides or slips; gliding; moving smoothly.
  2. 2.
    Slippery; elusory.[Obs.]
    “That sliding science hath me made so bare.” Chaucer.
Phrases & compounds
Sliding friction — the resistance one body meets with in sliding along the surface of another, as distinguished from rolling friction.
Sliding gunter — a topmast arranged with metallic fittings so as to be hoisted and lowered by means of halyards.
Sliding keel — a movable keel, similar to a centeboard.
Sliding pair — See the Note under Pair, n., 7.
Sliding rule — Same as Slide rule, under Slide, n.
Sliding scale — A scale for raising or lowering imposts in proportion to the fall or rise of prices
Sliding ways — the timber guides used in launching a vessel.