骨化

骨化	gǔ huà	to ossify / ossification
骨	gū	used in 骨碌碌 / used in 骨碌 / used in 骨朵
骨	gǔ	bone
化	huā	variant of 花
化	huà	to make into / to change into / -ization / to ... -ize / to transform / abbr. for 化学