Translation

batto means "Bat" in English.
It's a katakanization, a loan-word.

batto is normally written with katakana, as バット.
batto written with hiragana is ばっと.
batto does not have kanji.
Romaji ba tto
Katakana
Hiragana

Orthography Notes

  • ット contains a small tsu which makes the consonant of the syllable longer.

Further Reading

Wikipedia: コウモリ (Bat)