Where does “小児科” come from?

小児科 (Japanese) comes from Japanese 小児, from Japanese 小, from Old Japanese ささ.

小児科 (Japanese): pediatrics, either as a course of study or a...

Definitions

小児科 traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Japanese	小児	young child, infant
2	Japanese	小	smallness; small size, small; Short for 小の月;...
3	Old Japanese	ささ	—

Step	Language	Word	Meaning
1	Japanese	科	department, section; family; crime; wrongdoing
2	Japanese	品	article, goods; stock; quality
3	Middle Chinese	品	—