The phrase "a middle part" is correct and usable in written English.
It can be used to refer to a central section of something, whether it's a physical object, a narrative, or a concept.
Example: "In the middle part of the story, the protagonist faces significant challenges that test their resolve."
Alternatives: "central section" or "intermediate segment".
A middle part can fall flat, and if you've been parting your hair on the same side for years, it will be trained to the part and fall flat.
A middle part and blunt edges gave models a style that intrigued Versace.
BOB COSTAS: Master, with all due respect, I am afraid if I have a middle part I will look like Rachel Bilson.
This meant creating a natural texture using only Redken Forceful 23, a middle part and then allowing ears to stick out, and finally setting with a wig cap to be removed at the last minute.
It could be worth the price of a trim, because, according to Neil Moodie, the Bumble and Bumble stylist who created a slept-in-looking variation at Burberry Prorsum, a middle part can make you look years younger than a side part or fussy up-do.
Mr. Barenboim and his players created a performance in which they were deeply embedded, a performance in which the phrasing of a middle part or the contour of a slow crescendo would make its effect even amid so much other detail.
Its stylet has a tapered tip, a bulb-like base, and a slender middle part with a nearly constant diameter of ∼86 μm (Fig. 3A).
In the end, the structure formed includes a dense bottom part with relatively small diameters, a merged middle part, and a low-density top with relatively big diameters, as shown in Fig. 8f.
"El Medina," which is being screened today and tomorrow as part of the New New Directors/New Films series at the Museum of Modern Art, meanders a bit in a long middle part that follows Ali to Paris.
It has a jagged end for cutting the avocado (looks suspiciously like a knife), and a cylindrical middle part with blades inside to take the pit out (little knives!).
The GmPHD family members contained conserved N-terminal region, a variable middle part and a conserved C-terminal PHD finger domain.
