| HAL | halophiles in saline environments such as the Dead Sea or salt flats |
|---|---|
| HAL | one of various compounds of carbon and any of the halogens |
| HAL | dioecious trees or shrubs of New Zealand |
| HAL | New Zealand shrub |
| HAL | compounds with the formula CHX3, where X is a halogen atom |
| HAL | any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions |
| HAL | a coarse annual herb introduced into North America from Siberia |
| HAL | a coarse annual herb introduced into North America from Siberia |
| HAL | Algerian plant formerly burned to obtain calcium carbonate |
| HAL | a compound in which the hydrogen atoms of a hydrocarbon have been replaced by bromine and other halogen atoms |
| HAL | tranquilizer (trade name Haldol) used to treat some psychotic disorders and Tourette's syndrome |
| HAL | archaebacteria requiring a salt-rich environment for growth and survival |