phototachymetern.

Brit.

/ˌfəʊtəʊtəˈkɪmᵻtə/, U.S.

/ˌfoʊdoʊtəˈkɪmədər/

Origin: Formed within English, by compounding; modelled on a Russian lexical item. Etymons: photo- comb. form, tachymeter n.

Etymology: < photo- comb. form + tachymeter n., after Russian svetodal′nomer (1956 or earlier; < svet light + -o- -o- connective + dal′no , combining form of dal′nyj distant + mer- , stem of merit′ to measure). Compare earlier phototachymetrical adj. and slightly later phototachymetric adj.

Surveying.

An optical form of tachymeter.

ΚΠ

1977 Soviet Jrnl. Optical Technol. 44 iv. 491 (title) Effect of the temporal characteristics of a semiconductor laser on the accuracy of a distance measurement by means of a pulsed-phase phototachymeter in which it is used.

1986 Soviet Geol. & Geophysics 27 73 Phototachymeter data on low-frequency oscillations of the crust after an earthquake are analyzed.

This is a new entry (OED Third Edition, March 2006; most recently modified version published online March 2022).

单词	phototachymeter
释义	phototachymetern. Brit. /ˌfəʊtəʊtəˈkɪmᵻtə/, U.S. /ˌfoʊdoʊtəˈkɪmədər/ Origin: Formed within English, by compounding; modelled on a Russian lexical item. Etymons: photo- comb. form, tachymeter n. Etymology: < photo- comb. form + tachymeter n., after Russian svetodal′nomer (1956 or earlier; < svet light + -o- -o- connective + dal′no , combining form of dal′nyj distant + mer- , stem of merit′ to measure). Compare earlier phototachymetrical adj. and slightly later phototachymetric adj. Surveying. An optical form of tachymeter. ΚΠ 1977 Soviet Jrnl. Optical Technol. 44 iv. 491 (title) Effect of the temporal characteristics of a semiconductor laser on the accuracy of a distance measurement by means of a pulsed-phase phototachymeter in which it is used. 1986 Soviet Geol. & Geophysics 27 73 Phototachymeter data on low-frequency oscillations of the crust after an earthquake are analyzed. This is a new entry (OED Third Edition, March 2006; most recently modified version published online March 2022). < n.1977
随便看	earthquake-proofing earthquake-resistant earthquake-rifted earthquake-ruined earthquake-shaken earthquake-voice earthquaked earthquakefiend earthquakegown earthquakependulummicrophone earthquakeproof earthquakeproofing earthquakeresistant earthquakerifted earthquakeruined earthquakes earthquakeshaken earthquakevoice earthquaking earthquaky earthquave earthrefreshing earthriche earthridge earthrind