bay 3 
(bā)
(bā)adj.
Reddish-brown: a bay colt.
n.
1. A reddish brown.
2. A reddish-brown animal, especially a horse having a black mane and tail.
[Middle English bai, from Old French, from Latin badius, perhaps of Celtic origin; akin to Old Irish buide, yellow.]
- rheology
- rheometer
- rheostat
- rheostatic
- rheotactic
- rheotaxis
- rhesus
- Rhesus factor
- rhesus monkey
- rhetor
- rhetoric
- rhetorical
- rhetorically
- rhetorical question
- rhetorician
- rheum
- rheumatic
- rheumatic disease
- rheumatic fever
- rheumatic heart disease
- rheumatism
- rheumatoid
- rheumatoidal
- rheumatoid arthritis
- rheumatoid factor