What is the meaning of Biwa?

A plucked lute, originating in the classical and traditional music of Japan, characterized by a pear-shaped body and four or five high frets, giving the instrument a distinctively twangy tone.

Cultured freshwater pearls, especially referring to the flat type of biwa pearls.

Rōmaji transcription of びわ

Rōmaji transcription of ビワ

loquat tree

Source: wiktionary.org