1. 大便：上厕所当然是大便 (defecate) 和小便 (urinate) -- 粪便叫做 feces 或 excrement,日常生活经常以 poo-poo 这个儿语的委婉语来表达;尿液叫做 urine,尿尿的非正式讲法是 pee (动词;名词):I must go for/have a pee 我得去小便了.
2. 澄清：defeature 损伤外貌 | defecate 澄清 | defecation 澄清
3. 澄清 n. 通大便,排粪：372. Decubitus n. [医]卧姿, 褥疮 | 373. Defecate . 澄清 n. 通大便,排粪 | 374. Deference尊重;顺从,deferent
4. 澄清;净化：defeatherer (家禽)退毛机;去毛机;拔毛机 | defecate 澄清;净化 | defecation 澄清(作用净化(作用)
2. defecate的解释
1. 排便;排粪
When people and animals defecate, they get rid of waste matter from their body through their anus.
e.g. Animals defecate after every meal.
动物每次进食后都会排粪。