faeces vs meconium

faeces and meconium both are nouns.

Word	Noun	Adjective	Verb	Adverb
faeces	Yes	No	No	No
meconium	Yes	No	No	No

As nouns, meconium is a hyponym of faeces; that is, meconium is a word with a more specific, narrower meaning than faeces:

faeces: solid excretory product evacuated from the bowels
meconium: thick dark green mucoid material that is the first feces of a newborn child

Other hyponyms of faeces include dog do, dog shit, dog turd, doggy do, crap, dirt, poop, shit, shite, turd, droppings, dung, muck, melaena, melena.

faeces (noun)	meconium (noun)
solid excretory product evacuated from the bowels	thick dark green mucoid material that is the first feces of a newborn child