foal
noun
[ fəʊl ]
• a young horse or related animal.
Similar:
young horse/donkey/pony/mule,
colt,
filly,
foal
verb
• (of a mare) give birth to a foal.
Origin:
Old English fola, of Germanic origin; related to Dutch veulen and German Fohlen, also to filly.
in foal
• (of a mare) pregnant.