It's Merriam-Webster's Word of the Day for August 1st.
Today's word is midriff, spelled as one word, M-I-D-R-I-F-F.
Midriff is a noun.
It refers to the area around a person's middle, that is,
the front of their body between the chest and the waist.
Here's the word used in a sentence from The New Yorker by Anthony Lane.
I can be terribly self-involved, he says,
though you can't be sure whether he's warning her or bragging.
She introduces him to her parents, an all but unwatchable clash of opposites,
with Tomas rolling up late in a sheer black crop top covered in dragons that leaves his midriff bare.
Today the word midriff is likely to evoke a plummy tummy or some fab abs.
But the mid-torso sense of midriff is relatively young,
having bellied up to the bar of English usage only in the early 19th century.
For most of its history, midriff has been used to refer to the diaphragm, the large,
flat muscle that separates the lungs from the stomach area,
and contracts spasmodically when we hiccup.
This diaphragm sense has been around for at least a thousand years,
with the earliest known uses of midriff, which comes from the Old English word riff,
meaning womb or belly, being found in manuscripts such as Bald's Leech Book,
a medical text that is believed to date back to the mid-10th century.