"ventilated structure with slat sides used to store unshelled maize," 1804, American English, from corn (n.1) + crib (n.).
Entries linking to corn-crib
corn n.1
"grain," Old English corn "single seed of a cereal plant; seeds of cereal plants generally; plants which produce corn when growing in the field," from Proto-Germanic *kurnam "small seed" (source also of Old Frisian and Old Saxon korn "grain," Middle Dutch coren, German Korn, Old Norse korn, Gothic kaurn), from PIE root *gre-no- "grain."
The sense of the Old English word was "grain with the seed still in" (as in barleycorn) rather than a particular plant. Locally understood to denote the leading crop of a district. It has been restricted to the indigenous "maize" in America (c. 1600, originally Indian corn, but the adjective was dropped), usually "wheat" in England, "oats" in Scotland and Ireland, while Korn means "rye" in parts of Germany.
Maize was introduced to China by 1550, it thrived where rice did not grow well and was a significant factor in the 18th century population boom there. Corn-starch is from 1850. Corn-silk is attested from 1852.
crib n.
Old English cribbe "manger of a cattle stable, fodder bin in cowsheds and fields," from a West Germanic word (source also of Old Saxon kribbia "manger;" Old Frisian and Middle Dutch kribbe; Old High German krippa, German Krippe "crib, manger") probably related to German Krebe "basket."
Meaning "enclosed child's bed with barred sides" is 1640s; probably from frequent use in reference to the manger where infant Jesus was laid. Thieves' slang for "house, public house, shop" dates to at least 1812, but late 20c. slang use for "dwelling house" probably is independent. The Old High German version of the word passed to French and became creche.