The word for today is…
fascicle (noun) -
1: a small or slender bundle: such as
a: a tight cluster of plant parts (such as leaves or flowers)
b: a slender bundle of anatomical fibers (such as muscle or nerve fibers) : fasciculus sense 1
2: one of the divisions of a book published in parts
Source : Merriam-Webster
Etymology : Fascicle, which has been a part of our language since the 15th century, is one of a bundle of words derived from Latin fascis, meaning "bundle." In book publishing, "fascicle" and its variants "fascicule" and "fasciculus" can all be used for one of the installments of a voluminous work; "fasciculus" can also be used for a bundle of anatomical fibers. "Fasciitis" is an inflammation of a "fascia," which is a sheet of tissue connecting muscles. You can also have a case of "fasciculation," or muscular twitching. Other descendants of "fascis" include "fasces" (a bundle of rods and an ax borne before ancient Roman magistrates as a badge of authority) and "fascine" (a long bundle of sticks of wood bound together).
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