expansion


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Related to expansion: Binomial expansion, Thermal expansion, Taylor expansion

ex·pan·sion

(eks-pan'shŭn),
1. An increase in size as of chest or lungs.
2. The spreading out of any structure (for example, a tendon)).
3. An expanse; a wide area.
[L. ex-pando, pp. -pansus, to spread out]

expansion

/ex·pan·sion/ (ek-span´shun)
1. the process or state of being increased in extent, surface, or bulk.
2. a region or area of increased bulk or surface.

clonal expansion  an immunological response in which lymphocytes stimulated by antigen proliferate and amplify the population of relevant cells.
dorsal digital expansion , extensor expansion extensor aponeurosis; a triangular aponeurotic extension of the digital extensor tendon on the dorsum of the proximal phalanx of each digit, to which the tendons of the lumbrical and interosseous muscles are also attached, forming a movable hood around the metacarpophalangeal joint.

expansion

[ekspan′shən]
Etymology: L, expandere, to spread out
1 the process or state of being increased in extent, surface, or bulk.
2 a region or area of increased bulk or surface.

ex·pan·sion

(eks-pan'shŭn)
1. An increase in size as of chest or lungs.
2. The spreading out of any structure, as a tendon.
3. An expanse; a wide area.
[L. ex-pando, pp. -pansus, to spread out]

ex·pan·sion

(eks-pan'shŭn)
1. An increase in size as of chest or lungs.
2. Spreading out of any structure (e.g., a tendon).
[L. ex-pando, pp. -pansus, to spread out]

expansion,

n an increase in extent, size, volume, or scope.
expansion, delayed (secondary expansion),
n 1. an expansion occurring in amalgam restorations as a result of moisture contamination.
n 2. an expansion exhibited by amalgam that has been contaminated by moisture during trituration or insertion.
expansion, dental arch,
n the therapeutic increase in circumference of the dental arch by buccal or labial movement of the teeth.
expansion, hygroscopic,
n an expansion, caused by absorption of water during setting of an investment, used to compensate for the shrinkage of metal from the molten to the solid state.
expansion, secondary,
n See expansion, delayed.
expansion, setting,
n an expansion that occurs during the setting or hardening of materials such as amalgam and gypsum products.
expansion, thermal,
n an expansion caused by heat. Thermal expansion of the mold is one of the important factors in achieving adequate compensation for the contraction of cast metal when it solidifies.
expansion, thermal coefficient,
n a number indicating the amount of expansion caused by each degree of temperature change. The rate of change in restorative materials and tooth substance should be relatively the same.
References in classic literature ?
His machine was, however neither bird-like nor butterfly-like, nor had it the wide, lateral expansion of the ordinary aeroplane.
All seemed to favour the expansion of the British Empire, and had there been men like Richard Dalloway in the time of Charles the First, the map would undoubtedly be red where it is now an odious green.
Surely nothing could be better, hardly anything more directly fitted than careful reading of Wordsworth, to counter the faults and offences of our busy generation, in regard both to thought and taste, and to remind people, amid the enormous expansion, at the present time, of all that is material and mechanical in life, of the essential value, the permanent ends, of life itself.
In the five years that followed, China's expansion, in all land directions, went on apace.
In spite of the maturity of his years and of the savage rigidity of the mould that had formed him, his nature was undergoing an expansion.
Joe sat on the stool, leaning far back into the corner, head thrown back and arms outstretched on the ropes to give easy expansion to the chest.
I was in touch with great souls who exalted flesh and spirit over dollars and cents, and to whom the thin wail of the starved slum child meant more than all the pomp and circumstance of commercial expansion and world empire.
Matthew did not know that Samuel, in the recent expansion of his business, had set up a lady clerk also; she was a niece of his wife's and a very dashing young person indeed, with a huge, drooping pompadour, big, rolling brown eyes, and a most extensive and bewildering smile.
Well, old Michel," replied Barbicane, "you would not have made a feigned monster long, for in spite of your diver's dress, swollen by the expansion of air within you, you would have burst like a shell, or rather like a balloon which has risen too high.
Not much later began the vast expansion of the physical world through geographical exploration.
There was a certain graceful ease and freedom about all he said and did, that gave a sense of repose and expansion to the mind, after so much constraint and formality as I had been doomed to suffer.
Jukes, in moments of expansion on shore, would proclaim loudly that the "old girl was as good as she was pretty.