'Arroyo' definitions:

Definition of 'arroyo'

From: WordNet
noun
A stream or brook

Arroyo -- U.S. Municipio in Puerto Rico

From: Gazetteer 2000
Name :
Arroyo -- U.S. Municipio in Puerto Rico
Population (2000) :
19117
Housing Units (2000) :
7287
Land area (2000) :
15.041121 sq. miles (38.956324 sq. km)
Water area (2000) :
20.597075 sq. miles (53.346177 sq. km)
Total area (2000) :
35.638196 sq. miles (92.302501 sq. km)
Located within :
Puerto Rico (PR), FIPS 72
Location :
17.985289 N, 66.056396 W