HH16

HH16, HH-16, HH 16, HH.16, may refer to:


 * Semaphorin-3A (HH16)


 * HH16, one of the Hamburger–Hamilton stages in chick development
 * HH-16 rat tumor cell line; see fluorescence in situ hybridization
 * HH-16 helicopter, a Thai military helicopter type stationed at U-Tapao Royal Thai Navy Airfield