To chew cud. (Said of ruminants.) Involves regurgitating partially digested food from the rumen.
A camel will ruminate just as a cow will.
To meditate or reflect.
I didn't answer right away because I needed to ruminate first.
To meditate or ponder over; to muse on.
Having a hard albumen penetrated by irregular channels filled with softer matter, as the nutmeg and the seeds of the North American papaw.
a ruminate endosperm