ONLINECLOCK.NET — Second Clock & Second Timer
This clock updates precisely each second boundary for a smooth, accurate display.

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SECOND Synonyms: 111 Similar and Opposite Words | Merriam ...
Synonyms for SECOND: minute, moment, heartbeat, instant, split second, nanosecond, jiffy, trice; Antonyms of SECOND: age, eternity, forever, lifetime, eon, infinity, first, original

Orders of magnitude (time) - Wikipedia
Metric prefixes are defined spanning 10−30 to 1030, 60 decimal orders of magnitude which may be used in conjunction with the metric base unit of second. Metric units of time larger than the second are most commonly seen only in a few scientific contexts such as observational astronomy and materials science, although this depends on the author.

Ordinal Numbers in English – Rules, List, Usage & Examples
Ordinal numbers in English show the position or order of things—like first, second, third, and so on. They’re used all the time in everyday English, whether you’re talking about dates, competitions, floors in a building, or steps in a process.

“I Second That”: What It Means & How to Use It - wikiHow
You’ve probably heard someone say “I second that” or “I second that motion” before. But what exactly does this common English idiom mean, and what’s the correct way to use it in conversation? If you’re interested in the answers to these questions, look no further!

SECOND Definition & Meaning | Dictionary.com
If you ask whether you're second in line, the hostess might reply, "Give me a second and I'll tell you." Different meanings of the word second have evolved from the same background, which is the Latin word secundus, which means "next" or "following."

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Second | Measurement, Timekeeping, Clock | Britannica
Because the round-trip through the microwave cavity takes about a second, control of the microwave frequency has resulted in greater timekeeping accuracy. The best cesium fountain atomic clocks are now predicted to be off by less than one second in more than 50 million years.