Wiktionary
n. A very fine needle
Usage examples of "microneedle".
Juan filled five microneedle hypos full of neomorphine and drew a circle on his leg with a grease pencil fifteen centimeters below his knee.
A round hole in the center of the lid held one of the probe-cards, its array of microneedles matching the connections at the periphery of each F1 cube on the disk.
Forty billion bytes of data were sequentially driven out of the Teradyne tester, through an array of woven cables, into the back of the probecard, through the microneedles, and into the F1 chip under test.
The chuck then automatically lowered and moved by the preprogrammed distance in the X-direction, bringing the adjacent RAM in the array under the microneedles and lifting it up to test.
Juan laid out the other microneedles in case he needed more painkiller during the night, and we went to bed in our long johns, with me hugging Juan from behind on his narrow little mattress.
The faint hiss of the medication squeezing through the microneedles and into my bloodstream always reassured me.