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 (s) [sek´und]
the base SI unit of time, equal to ¹⁄₆₀ of a minute, and defined in terms of the periodicity of specific radiation of cesium 133.


verb To temporarily transfer a person to the employ of another, as typically used in the UK, to gain work experience.


the SI unit of time. Symbol s. Abbreviated sec.

Patient discussion about second

Q. second wind My cousin is an experienced aerobic for nearly 2 years. She does vigorous exercises. How a ''second wind'' affects her and what is it?

A. The term ‘second wind is mostly known to the people who are related to the fitness. No matter how fit you are, the first few minutes into vigorous exercise you'll feel out of breath, and your muscles may ache. Your body isn't able to transport oxygen to the active muscles quickly enough. As a result, your muscles burn carbohydrates an aerobically, causing an increase in lactic acid production. Gradually, your body makes the transition to aerobic metabolism and begins to burn nutrients (carbohydrates and fats) aerobically. This shift over to aerobic metabolism coincides with your getting ''back in stride'' (a.k.a. the ''second wind''). The more you train and the more fit you become, the sooner you will get your ''breath'' back and reach an aerobic steady state that you can maintain for a relatively extended duration.

Q. What is the second phase of alcohol rehab? I guess the first one is well known... admitting you are addicted, but then what?

A. anybody??? advises about the second phase of rehab??

Q. what to expect from second month of pregnancy? My wife is pregnant for the first time and I'm knowledgeless...what should I expect from her second month? pain? moods? anything else I should know??

A. Thanks zoe2008, you've helped a lot! The craving thing is indeed happening, I've never bought so many sweet potato in my life!!!

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References in periodicals archive ?
If you ask a scope manufacturer what the Arc Seconds of resolution of a particular scope is, you might get an answer of 5 Arc Seconds.
Remember two things: First, Arc Seconds change with power.
It holds that the angular resolution of images formed on photographic plates or electronic detectors should be typically about 1 arc second.
0] ranges from 3 centimeters in very poor seeing (when it is hard to distinguish double stars 2 arc seconds apart) to perhaps 20 or 30 cm when the seeing is quite good.
Two arc seconds is an incredibly small angle -- equal to the separation of a car's headlights seen 100 kilometers away -- giving some idea of what we are up against when dealing with the atmosphere.
05 arc second, so a given exposure reveals stars two to three times fainter than before; contrast and dynamic range are also vastly increased.
During one 20-minute visual test, the total periodic error was 47 arc seconds with the maximum rate of drift being less than 12 arc seconds per minute -- an amount that could be corrected by pressing the guide button for two seconds
Haller and his coworkers recorded infrared stellar spectra at separations of 1/2 to 8 arc seconds from Sgr A*, or distances of 0.
Early studies of the central radio source's optical counterpart, a 16th-magnitude giant elliptical galaxy, revealed two bright knots about 2 arc seconds apart in the center of the system.
Bruce Partridge (Haverford College) and Edward Fomalont (National Radio Astronomy Observatory) are using the Very Large Array radio telescope in New Mexico to search for variations on angular scales from 10 arc seconds to about 1 arc minute.
You also need to input your pixel size in arc seconds.