== SIr'o' ==

(noun) I'm fairly certain that this means "mycelium", in part because there's a pun (look up "mycelium" on Wikipedia and you'll find it quite quickly), and also because it works with all of the examples.

However, the examples are also consistent with something like "network", "structure" or "plane"; perhaps by analogy it has come to mean both.

From episode 4 ("The Butcher's Knife ..."):

"This ships spore drive travels on a network of mycelium that's spread across the entire galaxy."

{qIb naQ velbogh 'atlhqam SIr'o' leng Dujvam SanmIr QuQ.}

 

"... when it exited from the mycelial plane."

{... 'atlhqam SIr'o' mejDI'.}