母印 is read as ぼいん (boin) and means thumbprint.
ぼいん
boin
ぼにゅう
mother's milk
ぼけん
prefecture of birth
ぼしゅうだん
population
ぼせいこうか
maternal effect
ぼいんさんかくけい
vowel triangle
ぼせん
bus
ぼいんせつぞく
hiatus
ぼへいきん
population mean
ぼけい
matrix (printing)
ぼざい
base material (in construction, etc.)
ぼがん
base rock
ぼせい
homeworld