世界上最長的英文單詞

最長的.單詞的詞根有：

pneumono-(of lung 肺的)

ultra-(beyond 越過)

micro-(very small 極小的)

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

silico-(of silicon 硅的)

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

coni-(koni,of dust 塵土的)

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