n. A work constructed beyond the main ditch of a fortress,
and in front of the curtain between two bastions, intended to defend
the curtain; a ravelin. See Ravelin.
n. A crescentic mass of granular protoplasm present in the
salivary glands.
n. 半月形堡垒
[医] 半月体, 新月[细胞], 新月形的