rollability

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English[edit]

Etymology[edit]

roll +‎ -ability

Noun[edit]

rollability (uncountable)

  1. The quality of being rollable.
    • 1963 September, “The new Tyne and Healey Mills yards of the North Eastern”, in Modern Railways, page 164:
      Like Tees, Tyne and Healey Mills are semi-automatic in operation, in that the hump operator personally controls the secondary retarders, on which he selects one of six leaving speeds, based on his judgment of a cut's rollability and speed and the degree of siding occupation on its destined route.

References[edit]