mǎ huí chóng
horse roundworm
parascaris equorum
马
mǎ
abbr. for Malaysia 馬來西亞|马来西亚[Ma3 lai2 xi1 ya4]
蛔
huí
old variant of 蛔[hui2]
虫
chóng
lower form of animal life, including insects, insect larvae, worms and similar creatures