hyūman ヒューマン

Translation

hyūman means "Human" in English.
It's a katakanization, a loan-word.

hyūman is normally written with katakana, as ヒューマン.
hyūman written with hiragana is ひゅーまん.

hyuuman is another way to romanize this word.
ヒュ is a compound kana representing a single syllable with multiple characters.
ヒュー contains a long dash called the prolonged sound mark which makes the vowel of the syllable longer.

Beware: some kanji that are difficult to handwrite are easy to type on the computer, which may skew the usage statistics.