Definition of rotoscythe in US English:

rotoscythe

(also rotascythe)

noun

rare
  • A lawnmower with rotating blades, designed to cut long grass or vegetation.

Origin

1930s; earliest use found in Implement & Machinery Review. From roto- + scythe.

Pronunciation

rotoscythe

/ˈrəʊtə(ʊ)sʌɪð/