synchronizer noun. ['sɪŋkrǝnʌɪzǝ] Also synchroniser. L19.
[from SYNCHRONIZE verb + -ER¹.]
A person who or thing which synchronizes; spec. (a) a device for synchronizing clocks, photographic or sound apparatus, etc.; (b) an apparatus for keeping two electric motors at the same speed, or for indicating the difference of their speeds.
New Scientist The light-dark cycle is the major synchronizer of circadian, as well as seasonal rhythms.

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