costa /cos·ta/ (kos´tah) [L.]
costa
1. a rib. 
)
2. a thin, firm, rodlike structure running along the base of the undulating membrane of certain flagellates.cos´tal
cos·ta (k s t )n. pl. cos·tae (-t  ) 1. Rib. 2. A rodlike internal supporting organelle that runs along the base of the undulating membrane of certain flagellate parasites. Also called basal rod. cos tal adj. |
costa
[kos′tə] pl. costae [kos′tē]
a rib.
costa
pl. costae [L.] a rib.
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