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concavity    
n. 中央凹陷,凹洼,凹状

中央凹陷,凹洼,凹状

concavity
n 1: a shape that curves or bends inward [synonym: {concave shape},
{concavity}, {incurvation}, {incurvature}]
2: the property possessed by a concave shape [synonym: {concavity},
{concaveness}]

Concavity \Con*cav"i*ty\, n.; pl. {Concavities}. [L. concavitas:
cf. F. concavit['e]. See {Concave}.]
A concave surface, or the space bounded by it; the state of
being concave.
[1913 Webster]

118 Moby Thesaurus words for "concavity":
aduncity, alveolation, alveolus, antrum, aquilinity, arching,
arcuation, armpit, basin, boss, bowl, bump, cavity, circularity,
colophon, concameration, concave, convexity, convolution, crater,
crookedness, crypt, cup, curvation, curvature, curving, curvity,
dactylogram, dactylograph, de-escalation, debasement, decurvation,
decurvature, degradation, demotion, dent, depression, descent,
detrusion, diminution, dint, dip, ducking, embossment, excrescence,
excurvation, excurvature, fingerprint, fold, follicle, footmark,
footprint, footstep, fossil footprint, funnel chest, hauling down,
hole, hollow, hollow shell, hollowness, hookedness, ichnite,
ichnolite, impress, impression, imprint, incurvation, incurvature,
incurvity, indent, indentation, indention, lacuna, lowering, lump,
pad, paw print, pawmark, pimple, pit, pocket, print, pug, pugmark,
punch bowl, recurvation, recurvature, recurvity, reduction,
rondure, rotundity, sag, scoop, seal, shell, sigil, signet, sink,
sinkage, sinkhole, sinking, sinuosity, sinuousness, sinus, socket,
stamp, step, stud, submergence, thrusting under, thumbmark,
thumbprint, tortuosity, tortuousness, trough, vaulting, vestige,
vug


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英文字典中文字典相关资料:


  • Trail of Tears - Wikipedia
    By the end of the decade in 1840, tens of thousands of Cherokee and other Indian nations had been removed from their land east of the Mississippi River The Creek, Choctaw, Seminole, and Chicksaw were also relocated under the Indian Removal Act of 1830
  • Digital History
    All Indians east of the Mississippi had been uprooted from their homelands and moved westward, with the exception of rebellious Seminoles in Florida, the Poarch Band of Creek Indians in Alabama, and small numbers of Indians living on isolated reservations in Michigan, North Carolina, and New York
  • Bureau of Indian Affairs Records: Tribal Rolls | National Archives
    The Indian Removal Act of 1830 (4 Stat 411) authorized the President to negotiate removal treaties with American Indian nations living east of the Mississippi River The goal was to remove Native Americans living in existing states and territories and send them west so that their lands would be available for settlers
  • The Trail of Tears and the Forced Relocation of the Cherokee . . . - NPS
    Between 1790 and 1830, tribes located east of the Mississippi River, including the Cherokees, Chickasaws, Choctaws, Creeks, and Seminoles, signed many treaties with the United States
  • Indian removal - PBS
    Under these treaties, the Indians were to give up their lands east of the Mississippi in exchange for lands to the west Those wishing to remain in the east would become citizens of their
  • Indian Territory - Native American Spaces . . . - Library of Congress
    In the early nineteenth century a movement began in the United States to remove Indian tribes from their ancestral lands in the rapidly developing eastern states and settle them in the newly acquired lands west of the Mississippi River
  • Impact of Native American Removal | Teacher Resource
    After resettling in Indian Territory, Native Peoples rebuilt their lives and cultures, and continued their struggle for self-government under their own laws on their new lands in the West
  • The Changing Relationship Between the US Government and Native Americans
    But east of the Mississippi River, they were an integral part of 1800’s U S society There were Native American businessmen, teachers, clergymen, and representatives in Washington They spoke English and French, intermarried with their white neighbours, and even owned slaves
  • The Effects of Removal on American Indian Tribes, Native Americans and . . .
    The removal of American Indian tribes from lands east of the Mississippi River to what is now the state of Oklahoma is one of the tragic episodes in American history
  • Milestones in the History of U. S. Foreign Relations - Office of the . . .
    Although Presidents Thomas Jefferson and James Monroe argued that the Indian tribes in the Southeast should exchange their land for lands west of the Mississippi River, they did not take steps to make this happen Indeed, the first major transfer of land occurred only as the result of war





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