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bent or curved like a bow.
historical examples

some specimens also have an arcuate black band over the forehead from one outer corner of the eye to the other.
a hand-book to the primates, volume 1 (of 2) henry o. forbes

these dichotomous processes are nothing more than branches developed from the arcuate, or mother cells.
fungi: their nature and uses mordecai cubitt cooke

valve narrow, with arcuate dorsal and straight ventral margin, acute at the ends.
the diatomaceae of philadelphia and vicinity charles sumner boyer

during all these changes, while the zygospore enlarges, the wall of the arcuate cells becomes coloured brown.
fungi: their nature and uses mordecai cubitt cooke

valve linear, arcuate on the dorsal, straight on the ventral side, reflexed at the extremities.
the diatomaceae of philadelphia and vicinity charles sumner boyer

when the clavola of the antenn grows gradually narrower towards the apex, and is arcuate or incurved so as to resemble a sickle.
an introduction to entomology: vol. iv (of 4) william kirby

multifoil, mul′ti-foil, adj. having more than five foils or arcuate divisions.
chambers’s twentieth century dictionary (part 2 of 4: e-m) various

the cell measures one cubic inch, the entrance tunnel being one and one half centimeters long, and arcuate.
wasps george w. peckham

the frustules are curved or arcuate (arcus, a bow) in the side view, oblong and narrowed at the ends in the front view.
an elementary text-book of the microscope john william griffith

these processes appear at first on one of the arcuate cells in successive order.
fungi: their nature and uses mordecai cubitt cooke

adjective
shaped or bent like an arc or bow: arcuate leaves, arcuate fibres of the cerebrum also arcuated
adj.

“bent like a bow,” 1620s, from latin arcuatus “bow-like, arched,” past participle of arcuare “to bend like a bow,” from arcus “bow” (see arc (n.)).

arcuate ar·cu·ate (är’kyōō-ĭt, -āt’)
adj.
formed in the shape of an arc.
ar’cu·ate·ly adv.