Of or pertaining to a breakfast taken early in the morning, or immediately on getting up.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "jentacular" in a sentence
"He rode his favourite hobby of gardening, and took his regular 'ante-jentacular' and 'post-prandial' walks, and played battledore and shuttlecock in the intervals of codification."