"acicular leaf of the pine tree," 1834, from pine (n.) + needle (n.).
Entries linking to pine-needle
pine n.
"coniferous tree, tree of the genus Pinus," Old English pin (in compounds), from Old French pin and directly from Latin pinus "pine, pine-tree, fir-tree," which is perhaps from a PIE *pi-nu-, from root *peie- "to be fat, swell" (see fat (adj.)).
If so, the tree's name would be a reference to its sap or pitch. Compare Sanskrit pituh "juice, sap, resin," pitudaruh "pine tree," Greek pitys "pine tree." Also see pitch (n.1). The native Old English word was furh (see fir). Pine-top "cheap illicit whiskey," is attested by 1858, Southern U.S. slang.
Most of us have wished vaguely & vainly at times that they knew a fir from a pine. As the Scotch fir is not a fir strictly speaking, but a pine, & as we shall continue to ignore this fact, it is plain that the matter concerns the botanist more than the man in the street. [Fowler]
needle n.
Old English nædl "small, pointed instrument for carrying a thread through woven fabric, leather, etc.," from Proto-Germanic *næthlo (source also of Old Saxon nathla, Old Norse nal, Old Frisian nedle, Old High German nadala, German Nadel, Gothic neþla "needle"), literally "a tool for sewing," from PIE *net-la-, from root *(s)ne- "to sew, to spin" (source also of Sanskrit snayati "wraps up," Greek nein "to spin," Latin nere "to spin," German nähen "to sew," Old Church Slavonic niti "thread," Old Irish snathat "needle," Welsh nyddu "to sew," nodwydd "needle") + instrumental suffix *-tla.
To seke out one lyne in all hys bookes wer to go looke a nedle in a meadow. [Thomas More, c. 1530]
Meaning "piece of magnetized steel in a compass" is from late 14c. (on a dial or indicator from 1928); the surgical instrument so called from 1727; phonographic sense from 1902; sense of "leaf of a fir or pine tree" first attested 1797. Needledom "the world of sewing" is from 1847. Needle's eye, figurative of a minute opening, often is a reference to Matthew xix.24.