portion


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por·tion

(pōr'shŭn),
Part or division.

por·tion

(pōr'shŭn)
Part or division.

segment of a bifocal lens (seg) 

An area of a bifocal lens of a power different to that of the main portion. Syn. portion. There is the distance portion, which has the correction for distance vision, and the near or reading portion, which has the correction for near vision. See intermediate portion.
References in classic literature ?
They resemble the steppes of Tartary more than any other known portion of Christendom; being, in fact, a vast country, incapable of sustaining a dense population, in the absence of the two great necessaries already named.
It would be difficult to find another portion of the world, of the same extent, which has so little useless land as the inhabited parts of the American Union.
Each house is, as it necessarily must be, the judge of the elections, qualifications, and returns of its members; and whatever improvements may be suggested by experience, for simplifying and accelerating the process in disputed cases, so great a portion of a year would unavoidably elapse, before an illegitimate member could be dispossessed of his seat, that the prospect of such an event would be little check to unfair and illicit means of obtaining a seat.
From the paintings over which his elaborate fancy brooded, and which grew, touch by touch, into vagueness at which I shuddered the more thrillingly, because I shuddered knowing not why;--from these paintings (vivid as their images now are before me) I would in vain endeavour to educe more than a small portion which should lie within the compass of merely written words.
And he was reigning in heaven, himself holding the lightning and glowing thunderbolt, when he had overcome by might his father Cronos; and he distributed fairly to the immortals their portions and declared their privileges.
Well, Grandfather," remarked Clara, "if wedding portions nowadays were paid as Miss Betsey's was, young ladies would not pride themselves upon an airy figure, as many of them do.
Then they roasted the outer meat, drew it off the spits, gave every man his portion, and feasted to their heart's content; those who waited at table gave Ulysses exactly the same portion as the others had, for Telemachus had told them to do so.
I had invariably noticed a certain degree of deference paid to him by all with whom I had ever seen him brought in contact; but when I remembered that my wanderings had been confined to a limited portion of the valley, and that towards the sea a number of distinguished chiefs resided, some of whom had separately visited me at Marheyo's house, and whom, until the Festival, I had never seen in the company of Mehevi, I felt disposed to believe that his rank after all might not be particularly elevated.
And he arrived at the laying-yard and caught Jerry, red-pawed and red-mouthed, in the midst of his fourth kill of an egg-layer, the raw yellow yolk of the portion of one egg, plastered by Agno to represent many eggs, still about his eyes and above his eyes to the bulge of his forehead.
My second brother having made the same proposal, decided upon going to the Indies, embarking the portion that fell to him in trade.
In this volume I have used portions of letters which I wrote for the Daily Alta California, of San Francisco, the proprietors of that journal having waived their rights and given me the necessary permission.
There was a common head, chieftain, or sovereign, whose authority extended over the whole nation; and a number of subordinate vassals, or feudatories, who had large portions of land allotted to them, and numerous trains of INFERIOR vassals or retainers, who occupied and cultivated that land upon the tenure of fealty or obedience, to the persons of whom they held it.