We see that almost always the term of "ad-hoc networks" comes with WSN (Wireless Sensor Network). Does it mean an ad-hoc network must be always wireless?
If we define an ad-hoc network as follows:
"An ad hoc network is a network that is composed of individual devices
communicating with each other directly." [1]
Can we imagine a "wired ad hoc" network?
[1] https://www.techopedia.com/definition/5868/ad-hoc-network
Best Answer
Caveat: This question might raise primarily opinion-based answers, and might be put on hold or considered off-topic, for exactly that reason.
Still, I dare to attempt an answer:
Following https://en.wikipedia.org/wiki/Ad_hoc#Networking
The linked main wikipedia article subsequently focusses on wireless ad hoc networks only.
However, I don't quite see why a wired ad hoc network should not be thinkable, if a few conditions are met:
... then yes, I would say that such a setup might be called an "ad hoc wired network".
(1) that might be subject of debate because a simple hub or switch fulfills the criterion of "little or no planning" with ease.