|—suffix forming adjectives|
|1.||having, full of, or characterized by: dangerous; spacious; languorous|
|2.||Compare -ic (in chemistry) indicating that an element is chemically combined in the lower of two possible valency states: ferrous; stannous|
|[from Old French, from Latin -ōsus or -us, Greek -os, adj suffixes]|
Possessing; full of; characterized by: filamentous.
Having a valence lower than that of a specified element in compounds or ions named with adjectives ending in -ic: ferrous.