"大便"和"小便"分别怎么用英文说?

defecate
def.e.cate
AHD:[dµf“¹-k³t”]
D.J.[6defi7keit]
K.K.[6dWf!7ket]
v.（动词）
def.e.cat.ed， def.e.cat.ing， def.e.cates
v.intr.（不及物动词）
To void feces from the bowels.
排粪：从肠里排大便
v.tr.（及物动词）
To remove (impurities, as in a chemical solution); clarify.
澄清（如化学溶液中的杂质）；净化

stool
AHD:[st›l]
D.J.[stu8l]
K.K.[stul]
n.（名词）
A backless and armless single seat supported on legs or a pedestal.
凳子：以凳腿或凳柱支持的无背无扶手的单座
A low bench or support for the feet or knees in sitting or kneeling, as a footrest.
矮凳，脚凳：坐或跪时支撑脚或膝的矮凳子或支撑物，如搁脚
A toilet seat; a commode.
抽水马桶，便桶
A bowel movement; an evacuation.
排便，大便
Evacuated fecal matter.
排放的粪便
Botany
【植物学】
A stump or rootstock that produces shoots or suckers.
母株：长出树茬或腋芽的树桩或根桩
A shoot or growth from such a stump or rootstock.
新枝：从根株长出的一簇新枝
v.intr.（不及物动词）
stooled， stoo