A double falciform ejection of water vapour from under the kettlelid at both sides simultaneously.
"Ulysses"
James Joyce
Galen, in the second century, taught that those who were born when the moon was falciform, or sickle-shaped, were weak and short-lived, while those born during the full moon were vigorous and of long life.
"Moon Lore"
Timothy Harley
Thus, the crescent or falciform shape is described by all observers as more constant and conspicuous in these sandhills than in those of littoral origin; they tend less to unite in continuous ridges, and they rarely attain the height or other dimensions of the dunes of the seashore.
"The Earth as Modified by Human Action"
George P. Marsh