Definition of R-boat in English:

R-boat

noun ˈɑːbəʊt

In the Second World War (1939–45): a German minesweeper. Now historical.

Origin

1940s; earliest use found in The Times. From R + boat, after German R-Boot, shortened (after U-Boot) from Räumboot minesweeper from räumen to clear, clear away + Boot.

Definition of R-boat in US English:

R-boat

nounˈɑːbəʊt

In the Second World War (1939–45): a German minesweeper. Now historical.

Origin

1940s; earliest use found in The Times. From R + boat, after German R-Boot, shortened (after U-Boot) from Räumboot minesweeper from räumen to clear, clear away + Boot.

词汇	R-boat
释义	Definition of R-boat in English: R-boat noun ˈɑːbəʊt In the Second World War (1939–45): a German minesweeper. Now historical. Origin 1940s; earliest use found in The Times. From R + boat, after German R-Boot, shortened (after U-Boot) from Räumboot minesweeper from räumen to clear, clear away + Boot. Definition of R-boat in US English: R-boat nounˈɑːbəʊt In the Second World War (1939–45): a German minesweeper. Now historical. Origin 1940s; earliest use found in The Times. From R + boat, after German R-Boot, shortened (after U-Boot) from Räumboot minesweeper from räumen to clear, clear away + Boot.
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