ironhead

1 8.3

A Harley-Davidson motorcycle engine made from 1957 to 1985 with iron parts at the top

noun
/ˈaɪərnˌhɛd/

Jargon

: motor de hierro

Examples

He spent months restoring his vintage ironhead to its original condition.
Many motorcycle enthusiasts admire the durability of the classic ironhead engine.
At the rally, several riders showed off their custom ironheads from the 1970s.
The classic ironhead motorcycle is a favorite among collectors.
Many ironheads were manufactured in the 1960s.
The classic ironhead engine has become a symbol of vintage Harley-Davidson motorcycles.
Many Harley enthusiasts appreciate the distinctive sound of an ironhead engine as they ride.
The mechanic praised the reliability of the ironhead, stating it was built to last for decades.

Surface Forms

ironhead singular

ironheads plural

Morphology

ironhead = iron + head (semi-transparent) = iron + head

The components 'iron' and 'head' are literal, but the term names a specific motorcycle engine type (cylinder heads made of cast iron), a technical usage that may not be obvious to general learners.

Etymology

The word ironhead comes from joining iron ('a strong metal') and head ('top part'), and it was used for motorcycle engines whose top parts were made of cast iron. So, calling an engine an ironhead points to its iron 'heads' and explains why these engines were known for their strength and long life.