"Dot". As in www.(dot)wiki.(dot)answers.(dot)com.
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It is axiomatic that a sentence starts with a capital letter for the first word and ends with a full stop.
Americans use the word 'period', instead of full stop.
A three-letter word for a full collection of items is "set." It can refer to a group of related items that are considered as a single unit, such as a set of dishes or a set of tools.
One seven letter word, One two letter word and a five letter word, One three letter word and a four letter word, One three letter word and two two letter words, Two three letter words, Three two letter words, A two letter word and a four letter word, A six letter word, A two letter word and a three letter word, A five letter word, Two two letter words, A four letter word, A three letter word, or A two letter word.
I've is a three letter word. I'll is another three letter word.
A three letter word for debt is owe.
Imp is a three-letter word for rapscallion.
A three letter word for a summit = Top.
A three letter word for help is aid.
A three letter word for gender is sex.
Ire is a three letter word for spleen.