The phrase "as the only solid" is correct and usable in written English.
It can be used in contexts where you are emphasizing that something is the sole tangible or concrete option among others.
Example: "In this experiment, water is considered as the only solid that can maintain its form under extreme pressure."
Alternatives: "as the sole solid" or "as the exclusive solid".
Imaging shows a large multilocular cystic renal mass, with septa as the only solid component (Fig. 5d).
photo © 2008 J Fowler | more info (via: Wylio With Amazon, Paypal and EveryDNS.net dissolving their relationships to WikiLeaks, leaving it without a stable home and a way to make money, Twitter currently serves as the only solid ground the Internet whistleblower has to stand on.
Further characterization depends on identifying fat within the renal mass as the only solid renal masses that can be reliably differentiated from renal cancer on CT or MRI are angiomyolipomas (AML).
As the science of human nature is the only solid foundation for the other sciences, "the only solid foundation we can give to this science itself must be laid on experience and observation" (T xvi.7).
(Rivoldini et al. (2011) explored inner core sizes but assumed Fe as the only constituent solid).
The uniqueness of this city is the absence of a centralized waste collection or disposal as its only solid waste incinerator located at Vilapilsala (8°32′20″N; 77°02′19.5″E) is shut down due to local agitation.
That can leave the PRC sitting on a huge pile of dollars and the U.S. economy as the only place big and solid enough to absorb it back.
The single shot fast spin echo (SSFSE or HASTE) sequence should not be used as the only T2W sequence as solid tumors may not be depicted on this sequence.
In this paper, we introduce a thermal plasma CVD process using only solid zinc as the source material, thereby simplifying the design of the synthesis system.
The epoxidation process was carried out using citric acid as the only acidic component, generating no solid residues and a liquid residue less toxic than the one from the conventional processes.
"Though what happened on Sept. 11 is a like a death in the family for all of us, we foresee the absorption of the available inventory created by the dot-com bust, which will leave New York City as the only U.S. city with a solid, low-vacancy rate," Florance says.
