- feather boa, boa - a long thin fluffy scarf of feathers or fur
--1 is a kind of scarf
- boa - any of several chiefly tropical constrictors with vestigial hind limbs
--2 is a kind of constrictor
--2 is a member of Boidae, family Boidae
--2 has particulars:boa constrictor, Constrictor constrictor; rubber boa, tow-headed snake, Charina bottae; rosy boa, Lichanura trivirgata; anaconda, Eunectes murinus; python