世界上最长的英文单词

最长的.单词的词根有：

pneumono-(of lung 肺的)

ultra-(beyond 越过)

micro-(very small 极小的)

scopic-(of viewing or observing 观察或注意的)

silico-(of silicon 硅的)

volcano-(mountain that releases fire and ash 火山的)

coni-(koni,of dust 尘土的)

osis-(forming the name of a disease 表示疾病)