phototachometryn.
rare. Apparently only attested in dictionaries or glossaries.
The measurement of the speed of light.
ΚΠ
1890 Cent. Dict. Phototachometry, the measurement of the velocity of light.
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online June 2021).
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n.1890- to throw up one's guts
- to throw up one's hands
- to throw up one's hat
- to throw up one's toenails, boots, etc
- to throw up the game
- to throw up the one's hand
- to throw up the sponge
- to throw, put, one's weight behind
- to thrum buttons
- to thrum caps
- to thrust a person's nose out of joint
- to thrust a thing down a person's throat
- to thrust down a person's throat
- to thrust one's nose in
- to thrust one's nose into
- to thrust one's tongue in one's cheek
- to thrust or run one's head in a bush
- to thrust out
- to thrust, to the wall
- to thug it out
- to thumb one's nose
- to thumb the belt of
- to thump a cushion, the pulpit
- to thump down
- to thump it