knocklessadj.
a. nonce-word. That enters without knocking on a door.
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1907 W. De Morgan Alice-for-Short xlvii. 500 Alice was interrupted by the advent of the doctor, knockless but with musical boots.
b. Of an engine: free from knock (knock n.1 1c).
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society > occupation and work > equipment > machine > machines which impart power > engine > [adjective] > other qualities or attributes
bell-mouthed1797
reverse1839
throttled1850
reversible1852
steam-jacketed1876
multi-cylindera1884
multiple-cylinder1888
four-cycle1909
multi-cylindered1909
knockless1928
throttleable1951
multi-fuel1957
stretched1960
multi-fuelled1964
1928 Daily Chron. 9 Aug. 11 (advt.) A ‘knockless’, livelier engine; reduced vibration and less wear and tear of engine parts.
This entry has not yet been fully updated (first published 1976; most recently modified version published online September 2019).
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adj.1907