blueprint

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Blueprint

1. A construction plan. It is called a blueprint because it historically has been printed on blue paper with white lines.

2. In photography, a copy of a periodical printed before final editing in which images are shown on blue paper.

3. Informal, a plan.

blueprint

A detailed set of plans used as a guide for construction.Because of the economies of a very inexpensive method of creating and copying such plans, they were formerly characterized by white lines on blue paper.

References in classic literature ?
People stared covertly at them; the band was playing; and there was the sea--the blue gaiety of the sea.
Large blue silk flags were flying from the windows of the Town Arms Inn, and bills were posted in every sash, intimating, in gigantic letters, that the Honourable Samuel Slumkey's committee sat there daily.
Twenty-nine of the choicest warriors instantly volunteered to follow Blue John in this hazardous enterprise.
Their route gradually took them among the Blue Mountains, which assumed the most rugged aspect on a near approach.
It was in the blue room where stood the prince, with a group of pale courtiers by his side.
My dress is blue and white checked," said Dorothy, smoothing out the wrinkles in it.
The little man took him by the hand, and led him through an underground passage, but he did not forget to take the blue light with him.
The suggestion of this headdress, which gave her what was then called a "Josephine look," was carried out in the cut of the dark blue velvet gown rather theatrically caught up under her bosom by a girdle with a large old-fashioned clasp.
The sulphur coating of that island was gaudy in the extreme--all mingled together in the richest confusion were red, blue, brown, black, yellow, white--I do not know that there was a color, or shade of a color, or combination of colors, unrepresented--and when the sun burst through the morning mists and fired this tinted magnificence, it topped imperial Vesuvius like a jeweled crown!
It would not surprise you if, as you came near seeking for an opening in the reef, it vanished suddenly from your view, and nothing met your gaze but the blue loneliness of the Pacific.
Suddenly, just before the whistle, in came two ladies with a little poodle, and sat down opposite to me; not bad-looking women; one was in light blue, the other in black silk.
So he strode whistling along the leafy forest path that led to Fosse Way, turning neither to the right hand nor the left, until at last he came to where the path branched, leading on the one hand onward to Fosse Way, and on the other, as well Little John knew, to the merry Blue Boar Inn.