hoolock gibbon
Refers to either of the two gibbon species in the genus Hoolock. A zoological term, but recognizable in general contexts.
I saw a hoolock gibbon at the zoo.
Katakana spelling is standard for this animal name; usually written in kana.
Kanji spelling exists but is rarely used; the katakana form is strongly preferred.
From English 'hoolock' (the genus name) + Japanese 手長猿 (てながざる, 'gibbon', literally 'long-armed monkey').