primary element

Networks of microtubules grow like tree roots into branching systems that form a primary element of the cytoskeleton that gives cells their shape and enables them to divide.

As the primary element of life on our planet, carbon is constantly journeying from living creatures down into the Earth's crust and back up into the atmosphere, but until recently, quantifying this journey was virtually impossible.

In Izzard’s mind, there was always going to be a stage version as a companion piece — though she had envisioned the audiobook as the primary element.

But then and now, the primary element in the discontent that has led to the rise of numerous dictators and their authoritarian imitators is fear: fear of newcomers, of oppressed citizens seeking to better their lot, of economic change and the disruption it can bring to many people’s lives.

Its primary element is a low, semicircular stone wall with 19 names and a series of dates inscribed on it at regular intervals.