spe·le·ol·o·gy 
(spē′lē-ŏlə-jē)
(spē′lē-ŏlə-jē)n.
1. The scientific study of caves.
2. Exploration of caves.
[French spéléologie : Latin spēlaeum, spēlēum, cave (from Greek spēlaion) + -logie, -logy.]
spe′le·o·logi·cal (-ə-lŏjĭ-kəl) adj.
spe′le·olo·gist n.
- jake
- jakes
- Jakob
- Jakob-Creutzfeldt disease
- Jakob Harmenszoon.
- Jakob Liebmann Meyer Beer.
- Jakob Ludwig Felix Mendelssohn-Bartholdy.
- Jakob Ludwig Karl
- Jakobson
- Jalal ad-Din Muhammad ar-Rumi.
- Jalandhar
- Jalandhar
- jalap
- Jalapa
- jalapeño
- jalfrazi
- jalfrezi
- jalopy
- jalousie
- jam
- jam
- Jamaica
- Jamaican
- jamb
- jambalaya