chemical

英 ['kem?k(?)l] 美['k?m?kl]

反義詞

CET4TEM4考研CET6中高頻詞核心詞匯

復(fù)數(shù):?chemicals;副詞:?chemically;

chemical: chemical: [16] Essentially chemical, and the related chemistry and chemist, come from alchemy with the initial al- dropped. Alchemy itself is of Arabic origin; al represents the Arabic definite article ‘the’, while the second element was borrowed from Greek khēmíā ‘a(chǎn)lchemy’. Loss of al- seems to have taken place originally in French, so the immediate source of the English words was French chimiste and chimique (whence the now obsolete English chemic, on which chemical was based).

At first this whole group of words continued to be used in the same sense as its progenitor alchemy; it is not really until the 17th century that we find it being consistently applied to what we would now recognize as the scientific discipline of chemistry.
=> alchemy
chemical (adj.): 1570s, "relating to chemistry," from chemic "of alchemy" (a worn-down derivative of Medieval Latin alchimicus; see alchemy) + -al (1). In early use also of alchemy. Related: Chemically.
chemical (n.): 1747, from chemical (adj.). Related: Chemicals.

1. Some of the companies illegally sent the wherewithal for making chemical weapons.: 有些公司非法為制造化學(xué)武器提供所需的資金和設(shè)備等。

2. The chemical structure of this particular molecule is very unusual.: 這個特殊分子的化學(xué)結(jié)構(gòu)很不尋常。

3. The chemical companies had amalgamated into a vast conglomerate.: 那些化學(xué)品公司已經(jīng)合并成一個龐大的企業(yè)集團(tuán)。

4. Catalysts are materials which greatly speed up chemical reactions.: 催化劑是可以大大加速化學(xué)反應(yīng)的物質(zhì)。

5. The Department maintains many close contacts with the chemical industry.: 這個部門與化工行業(yè)保持著眾多密切的聯(lián)系。