ro·ble 
(rōblā)
(rōblā)n.
1. Any of several oak trees, especially Quercus lobata of California, which has deeply lobed leaves and slender pointed acorns.
2. Any of several trees having hard durable wood similar to oak, especially the tropical American species Tabebuia rosea.
[Spanish and Portuguese, oak, both from Latin rōbur; see reudh- in the Appendix of Indo-European roots.]