the word 'steroid' is a modern scientific coinage derived from greek components. the first element, 'ster-', originates from the greek 'stereos', meaning solid or firm, which itself traces back to the pie root ster- meaning stiff or rigid. the second element, '-oid', comes from the greek suffix '-oeidēs', meaning resembling or having the form of. the term was constructed in the early 20th century to describe this class of chemically related lipids because their core molecular structure, the sterane ring system, is characteristically rigid and solid. thus, the name literally means 'resembling something solid', aptly reflecting the stable, rigid four-ring carbon framework that defines these compounds.

Structure: ster (solid) + oid (resembling) ster (from greek stereos, meaning solid, firm); oid (from greek -oeidēs, meaning resembling, like, having the form of).