rounded
convexo-concave
crescent
crescentic
crescentiform
horned
lunar
lunary
lunate
lunular
lunulate
meniscal
moony
semilunar
semilunary
sigmoid
concave
diacritical
double-sided
fantastic-looking
half-moon
high-water
horseshoe-shaped
iron-tipped
keen-edged
knifelike
nasty-looking
now-empty
pebbly
rock-strewn
semicircular
three-inch
triangular
v-shaped
windswept
yard-long