rotoscythen.
/ˈrəʊtə(ʊ)sʌɪð/, U.S. /ˈroʊdoʊˌsaɪð/ Now rare.
A lawnmower with rotating blades, designed to cut long grass or vegetation.The rotoscythe was the first successful design of rotary mower.
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rotoscythe1933
1933 Implement & Machinery Rev. 58 998/2 The ‘Rotoscythe’..introduces lawn cutting and maintenance in a way radically different from accepted lawn mower practice.
1955 Radio Times 22 Apr. 46/1 Rotoscythe cuts long or short, neater-quicker.
1966 ‘J. M. Berrisford’ Wild Garden i. 16 Rough grass..must be cut (by scythe or rotoscythe).
1983 Jrnl. Appl. Ecol. 20 610 Plots were cut to a 5-cm stubble with a rotoscythe mower.
This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022).
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n.1933