"to render (the abstract) concrete," 1826, from concrete (adj.) + -ize. Concrete itself sometimes was used as a verb in various senses from 1630s. Related: Concretized; concretizing.

"substance which speeds a chemical reaction but itself remains unchanged," 1900, formed in English (on analogy of analyst) from catalysis. Figurative use by 1943.

"stupid person," 1967, originally U.S. student slang, perhaps from earlier meaning "penis" (1964), itself probably an alteration of dick (n.). Related: Dorky; dorkiness.

a pin bent back on itself so as to form a spring and having a little sheath to fit over the point, 1857, from safety (adj.) + pin (n.).

"jail," by 1919, American English slang, also poky, pogey, of uncertain origin; Barnhart says perhaps altered from pogie "poorhouse" (1891), which itself is of unknown origin.

"the young of a chicken or domestic fowl," mid-15c. (early 14c. in surnames), a contraction of Middle English pulte, itself a contraction of polete "young chicken" (see pullet).

also corme, 1570s, "fruit of the service-tree," from French corme, from Latin cornum "cornel-cherry" (but applied to service-berries in French); see cornel. Of the tree itself, 1670s.