The constellation Reticulum is small and faint in Earth's southern sky.
Reticulum may also refer to:
- Endoplasmic reticulum, an organelle within the cell in eukaryotic organisms
- Anastomotic reticulum, a highly interconnected branching network
- Reticulum (anatomy), the second chamber in the alimentary canal of a ruminant animal
- Reticulum-cell sarcoma, a malignant tumor of reticular tissue that is composed primarily of neoplastic histiocytes
- Reticulum (Chinese astronomy), classified as two of 23 "Southern Asterisms" (近南極星區, Jìnnánjíxīngōu)
- Reticulum II, a dwarf galaxy rich in gold.
- Reticulum (networking), a networking stack for local and wide-area networks
