In bioenvironmental terms.

Third-person singular simple present indicative form of predub

(biochemistry) Any bromo derivative of uridine, but especially 5-bromouridine, whose triphosphate is used to immunocytochemically label newly synthesized RNA in living cells

(paleontology) Any fossil coral of the genus †Syringopora consisting of a cluster of upright tubes united together by small transverse tubules.