rotometern.

Brit.

/rəʊˈtɒmᵻtə/, U.S.

/roʊˈtɑmədər/

Origin: Formed within English, by compounding. Etymons: roto- comb. form, -meter comb. form².

Etymology: < roto- comb. form + -meter comb. form². Perhaps originally (in sense 1) an alteration of rotameter n. (compare rotameter n. 2).

1. A hand-held measuring device incorporating a small wheel that can be rolled over a map or plan, the revolutions of the wheel giving the notional distance travelled on the ground; = rotameter n. 2.

ΘΚΠ

the world > relative properties > measurement > measuring instrument > [noun] > for measuring distances > distance travelled > for measuring on a map or diagram

rotameter1897

rotometer1908

1908 J. L. Auerbacher Electr. Contracting ii. 20 In measuring the number of circuit feet on a plan, a rotometer will save time and promote accuracy.

1913 T. W. Croft Amer. Electricians' Handbk. 134 The rotometer (Fig. 141), is a convenient tool for scaling distances. The little wheel is run over the course of the circuit. The pointer indicates feet direct for drawings of certain scales.

1957 G. E. Hutchinson Treat. Limnol. I. ii. 166 The shore line may be measured on the map by means of a rotometer.

2005 J. K. Savage Tarboro Katmandu 29 They could be measured later in the office by a specialist using a celluloid wheel called a Rotometer.

2. A device with a transparent wall that can be fitted into a pipe or tube to indicate the rate of flow of fluid passing along it. Cf. rotameter n. 2.

ΚΠ

1916 U.S. Patent 1,203,103 1/1 The rotometer is shown with a cylindrical casing.

1977 Sci. Horticulturae 7 154 The air flow through the chamber was measured using a rotometer attached to the inlet of the regulator.

2006 D. W. Hendricks Water Treatm. Unit Processes 814 Flow monitoring for each column may be made by means of a rotometer or flow meter with..output to a computer.

This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022).

单词	rotometer
释义	rotometern. Brit. /rəʊˈtɒmᵻtə/, U.S. /roʊˈtɑmədər/ Origin: Formed within English, by compounding. Etymons: roto- comb. form, -meter comb. form². Etymology: < roto- comb. form + -meter comb. form². Perhaps originally (in sense 1) an alteration of rotameter n. (compare rotameter n. 2). 1. A hand-held measuring device incorporating a small wheel that can be rolled over a map or plan, the revolutions of the wheel giving the notional distance travelled on the ground; = rotameter n. 2. ΘΚΠ the world > relative properties > measurement > measuring instrument > [noun] > for measuring distances > distance travelled > for measuring on a map or diagram rotameter1897 rotometer1908 1908 J. L. Auerbacher Electr. Contracting ii. 20 In measuring the number of circuit feet on a plan, a rotometer will save time and promote accuracy. 1913 T. W. Croft Amer. Electricians' Handbk. 134 The rotometer (Fig. 141), is a convenient tool for scaling distances. The little wheel is run over the course of the circuit. The pointer indicates feet direct for drawings of certain scales. 1957 G. E. Hutchinson Treat. Limnol. I. ii. 166 The shore line may be measured on the map by means of a rotometer. 2005 J. K. Savage Tarboro Katmandu 29 They could be measured later in the office by a specialist using a celluloid wheel called a Rotometer. 2. A device with a transparent wall that can be fitted into a pipe or tube to indicate the rate of flow of fluid passing along it. Cf. rotameter n. 2. ΚΠ 1916 U.S. Patent 1,203,103 1/1 The rotometer is shown with a cylindrical casing. 1977 Sci. Horticulturae 7 154 The air flow through the chamber was measured using a rotometer attached to the inlet of the regulator. 2006 D. W. Hendricks Water Treatm. Unit Processes 814 Flow monitoring for each column may be made by means of a rotometer or flow meter with..output to a computer. This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022). < n.1908
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