名詞 boa:

1. a long thin fluffy scarf of feathers or fur
   同義詞：feather boa
2. any of several chiefly tropical constrictors with vestigial hind limbs

bo.a

n.（名詞）
Any of various large, nonvenomous, chiefly tropical snakes of the family Boidae, which includes the python, anaconda, boa constrictor, and other snakes that coil around and suffocate their prey.
蟒，蟒蛇：莽蛇科的大型、無毒，主要生活在熱帶的蛇，包括蟒蛇、蚺蛇、王蛇及其它用纏繞而使獵物窒息的蛇類
A long fluffy scarf made of soft material, such as fur or feathers.
長(zhǎng)圍巾：用如毛皮或羽毛等柔軟材料制成的長(zhǎng)而蓬松的圍巾

來源：
Middle English
中古英語
from Latin boa [a large water snake]
源自 拉丁語 boa [大水蛇]