1.
half-raw; half-cooked; medium-rare
food that is partially cooked, leaving the inside raw or undercooked
Describes food that is only partially cooked. Can be desirable (as with a medium-rare steak or a soft-boiled egg) or a health concern (as with undercooked chicken). Note the reading: 半生 refers to cooking doneness, while the same kanji read as はんせい means "half a lifetime."