bicone
plural of nop
(geometry) The three-dimensional shape swept by revolving an isosceles triangle around its edge of unequal length, or by joining two identical right circular cones, base to base.
simple past tense and past participle of assert
plural of katoptron
彫刻家は、光が対称的な円錐面を通してどのように屈折するかを研究するために、同一の直円錐二つを底面で接合したガラスの二重円錐を丁寧に造形した。
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