dilationn.
英 daɪ'leɪʃən | 美 dɪ'leʃən
中文n. 扩张，扩大；膨胀；详述
词根词源
dilation (n.)1590s, formed from dilate on the mistaken assumption that the -ate in that word was the Latin verbal suffix (it is instead part of the stem); the proper form, dilatation, is older (c. 1400).
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