多脾 is read as たひ (tahi) and means polysplenia.
たひ
tahi
たひしょう
polysplenia
たすう
majority
たかく
many-sided
たよう
diverse
たりょう
large quantity
たしょう
amount
ただい
great (quantity, amount, etc.)
たぶん
probably
たぼう
being very busy
おおい
frequent
たしつ
high humidity
たにんず
large number of people