The phrase "a single contribution" is correct and usable in written English.
It can be used when referring to one specific input or donation made by an individual or entity, often in the context of projects, research, or fundraising.
Example: "Her research paper was enhanced by a single contribution from a leading expert in the field."
Alternatives: "one contribution" or "a lone contribution".
A single contribution is a dud.
My campaign and political action committee haven't received a single contribution from Mr. Abramoff since, respectively, 1998 and 1999.
In the first half of this year, the Conservative Leadership Political Action Committee collected $5,000 -- a single contribution from a Florida retiree.
Today, a single individual, a single contribution, can be a part of something remarkable – offering clarity in a time of crisis, reversing decades of historical injustice, or finding consensus in disputed truths.
The membership also approved rules on how revenue is counted and costs are charged, to ensure that two United Ways do not count the same contribution or each deduct expenses from a single contribution.
However, in the 2010 election cycle, "super PAC" contributions were larger to Republican-affiliated groups ($47.3 million) than to Democratic ones ($36.4 million), and a single contribution from a billionaire like Shelden Adelson could outweigh thousands of smaller ones.
Today, Newton is best known as a physicist whose greatest single contribution was the formulation of classical mechanics and gravitational theory as set out in his Philosophae Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), first published in 1687, and now usually referred to simply as "Newton's Principia".
The donation ― the largest single contribution to a Harvey relief organization yet ― will found the Rebuild Texas Fund.
Some of those significant donations include the Bill & Melinda Gates Foundation's pledge of $50 million, its largest single contribution to a humanitarian cause.
The Court has prohibited equality as a rationale to limit contributions, and thus my legal complaint is not the inequality of a single $2.95 million contribution.
Single authors on a manuscript (n=29) most often reported contributions that satisfied all 3 ICMJE criteria (n=12; 41.4%), while 8 (27.6%) of them reported a single ICMJE contribution.
