"This week's theme: words having vowels aeiou once and only once, and in order.
annelidous (uh-NEL-uh-duhs) adjective - Of or relating to worms.
[From French anneler (to ring), from Latin anellus, diminutive of anus (ring).]
'The mud in many places was thrown up by numbers of some kind of worm, or annelidous animal.'Charles Darwin; Voyage of the Beagle; 1839."