halma
- n a board game in which players try to move their pieces into their opponent's bases
halo
- n an indication of radiant light drawn around the head of a saint
- n a toroidal shape
a halo of smoke - n a circle of light around the sun or moon
halo blight
- n a blight affecting the leaves of oats and other grasses
- n a blight of bean plants
haloalkane
- n organic compound in which halogen atoms have been substituted for hydrogen atoms in an alkane
halobacter
- n halophiles in saline environments such as the Dead Sea or salt flats
halobacteria
- n halophiles in saline environments such as the Dead Sea or salt flats
halobacterium
- n halophiles in saline environments such as the Dead Sea or salt flats
halocarbon
- n one of various compounds of carbon and any of the halogens
halocarpus
- n dioecious trees or shrubs of New Zealand; similar in habit to Dacrydium
haloform
- n compounds with the formula CHX3, where X is a halogen atom
halogen
- n any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
halogeton
- n a coarse annual herb introduced into North America from Siberia; dangerous to sheep and cattle on western rangelands because of its high oxalate content