The phrase "a tiny but vital" is correct and usable in written English.
You can use it to describe something that may be small in size or significance but is essential or important in a particular context.
Example: "The tiny but vital component in the machine ensures that everything runs smoothly."
Alternatives: "a small yet crucial" or "a minuscule but essential".
At the Stone, a tiny but vital shrine to experimental music, Joan as Police Woman plays two sets of her moody, entrancing songs.
So too are the servers of "high-frequency traders" who make money by dipping in and out of markets at blinding speed: putting their machines within metres of where trades actually happen gives them a tiny but vital edge.In this section The best years of their lives Carrying the torch The railway children Sky 1, Ofcom 0 Towards a new Enlightenment?
New "global networks" of commerce and banking were creating tiny but vital nodes of power that could defy an atrophying feudal order.
Walker offers tiny but vital incentives to stay: cans of tinned food and bags of rice.
But still, through the internet all kinds of small cultural initiatives are flourishing like tiny, but vital, blood transfusions within the body politic throughout the region.
And older children struggle to thrive when their bodies and minds are weakened by lack of these tiny but vital essentials, holding back productivity and national economic development.
Extensions to Tiny Encryption Algorithm (XTEA) and Corrected Block Tiny Encryption Algorithm (XXTEA) [25] are designed to deal with the weakness of tiny encryption algorithm (TEA), which is a tiny but fast block cipher.
The institute hired Hauser, Inc., a tiny but innovative Boulder, Colo.
The temple, which dates to 1887, now has a tiny congregation, but it has played a vital role in the history of Jewish life in America.
They do not have the growth profile of a tiny exploration enterprise, Ms. Vital conceded, but she expects the supermajors' production to pick up soon.
