Translation

bosuton-teria means "Boston Terrier" in English.
It's a katakanization, a loan-word.

bosuton-teria is normally written with katakana, as ボストン・テリア.
bosuton-teria written with hiragana is ぼすとん・てりあ.
bosuton-teria does not have kanji.
Romaji bo su to n te ri a
Katakana
Hiragana
Meaning Boston Terrier

Further Reading