flatworm
UK[ˈflætwɜːm]US[ˈflætwɜːrm]
n
a type of worm with a long, flat, soft body and no segments, many of which are parasites.
Morpheme Breakdown
flat
worm
flat
flat
worm
worm
Etymology
the word 'flatworm' is a modern english compound, transparently combining two ancient roots. 'flat' originates from proto-germanic flataz, via old norse, describing a level, spread-out surface. 'worm' derives from proto-germanic wurmiz, via old english, broadly referring to any creeping or crawling animal. the compound was formed to create a precise zoological term, literally describing a 'flat worm', which directly and logically names the creature's most distinctive physical characteristic—its dorsoventrally flattened body plan—distinguishing it from roundworms or segmented worms.
Analysis
Structure: flat (flat) + worm (worm)
- flat: from old norse 'flatr', meaning 'level, even'. functions as an adjective describing shape.
- worm: from old english 'wyrm', meaning 'serpent, creeping animal'. functions as the core noun.
Examples
the planarian is a common type of non-parasitic flatworm often studied in biology classes.
some flatworms, like tapeworms, can cause serious health problems in humans and animals.
under the microscope, the flatworm's simple digestive system is clearly visible.