rotometer noun. [rǝ(ʊ)'tɒmɪtǝ, 'rǝʊtǝmi:tǝ] Also rotameter [rǝ(ʊ)'ta-, 'rǝʊtǝ-]. E20.
[from ROTO- + -METER.]
A hand-held measuring device incorporating a small wheel whose revolutions are registered in terms of distance travelled, e.g. on a map or plan.

[TahlilGaran] English Dictionary ▲