What is the meaning of ?

something round and small, such as a drop of grain or a bead

the seed of a grain

a black, hard seed obtained from the skin of a soapnut tree

Synonym of 無患子 (mukuroji, Indian soapberry (Sapindus mukoross))

a small change of coins

the bead of an abacus

a person or thing who makes up a larger group of such

a beat of a percussion instrument during performances such as noh and nagauta

a wig used in kabuki plays whose chignon is small and round

Synonym of (tsubu, pond snail, now dialectal)

dice; die

Synonym of (tsubu, something round and small, etc.)

Synonym of (tsubu, something round and small, etc.)

used to count things that are round and small, such as seeds and pills

Source: wiktionary.org