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Half ... ½
Part, such that two of which make a whole
If something is divided in two equal parts, the two parts are said to be HALF of the original. This works well for things that can be easily divided, but not so well for other things.
Half (pronounced "harf"), fifty percent, one part of two, a demi-section of something, or 0.5
Half is fifty percent. A glass may be half full, or half empty, and although both statements are equally correct, the choice of which to use suggests whether the person is an optimist or a pessimist.
Half (½) as a decimal is 0.5
Two halves make a whole.
Half of a half... is a quarter ¼
Realising there were already a few things which featured a half, or ½ , somewhere in them, at this site, I decided to write this and include some references, as follows...
½ - half symbol - a fraction with a figure one atop a figure two, signifying one divided by two. To get this on a computer keyboard, using the keyboard codes as follows: hold down ALT, then type 171 on the numeric keypad, and then release ALT.
Half Life - the time it takes half of the radioactive material to change into something else. After one half-life, 50% of the stuff will have changed. After two half-lives, 75% of it will have changed.
50-50 - fifty-fifty, a percentage-based estimation of chance. Often misused. See fifty fifty
Half.com - part of eBay.
Halfords - a bicycle shop / hardware shop, which has the first part of its name as "Half" as per what this page is about. However, the name is pronounced Hal-Fords, or Hal'fds.
Half Time - the short break during the middle of a game of football when the teams change ends
Halfway - half-way - fifty percent of the distance
Half Price - on sale with a 50% reduction in the amount of money being asked. For example, Half Price Perfumes
Half-hearted - without full enthusiasm
Half-baked ideas - notions which aren't necessarily bad, but which are only partly thought-through. These often have an inspired initial idea but a lack of completion, often with an absence of consideration of the consequences.
I'll have 'arf - (I'll have half!) meaning "I will have half a pint of beer" - catchphrase of Jacko in old British sitcom Love Thy Neighbour
It Ain't Half Hot Mum - another old-style comedy - see http://en.wikipedia.org/wiki/It_Ain%27t_Half_Hot_Mum . The title is a quote as if from a letter written by a solider in India writing to his mother in Britain, commenting on the tropical conditions.
Half a crown - a half-crown was an old British pre-decimalisation coin, worth two shillings and sixpence. This was half that of "a crown" which was worth five shillings. In Old Money there were twenty shillings in a pound. Both the five shilling coin (crown) and the two-and-sixpence coin (half-crown) were quite large, and some of the early ones contain silver. The value of the collectibles is much higher than the value of the silver content.
Half a sixpence - musical comedy - see http://en.wikipedia.org/wiki/Half_a_Sixpence
Half-cocked or to go off at half-cock - going ill-prepared and making mistakes with unintended consequences - See http://en.wikipedia.org/wiki/Half-cock
Half a pound of tuppenny rice - literally eight ounces of rice of a quality which sold for two pennies per pound. However, there are other more poetical meanings, for example Tuppenny Rice a slang term for loose change. From the much argued-over old rhyme "Pop Goes The Weasel".