chemical

英 ['kemɪk(ə)l] 美 ['kɛmɪkl]

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 ‘alchemy’. 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.: 有些公司非法为制造化学武器提供所需的资金和设备等。

2. The chemical structure of this particular molecule is very unusual.: 这个特殊分子的化学结构很不寻常。

3. The chemical companies had amalgamated into a vast conglomerate.: 那些化学品公司已经合并成一个庞大的企业集团。

4. Catalysts are materials which greatly speed up chemical reactions.: 催化剂是可以大大加速化学反应的物质。

5. The Department maintains many close contacts with the chemical industry.: 这个部门与化工行业保持着众多密切的联系。