In Genesis 24:10, 64, this signifies in general worldly knowledge in the natural man. (Arcana Coelestia 3046, 4104)

In Jeremiah 49:32, this signifies memory-knowledges used to confirm truths or falsities. (Apocalypse Explained 417[7])

A camel (Matthew 22:24) signifies scientific knowledge.

(References: Arcana Coelestia 3048, 10227)