Spice definition of resistor/capacitor
Google search found that Micro-Cap Spice simulator does allow for .define keyword to be used.

I understand that .define could be omitted from the code you showed with the following change:

il   0 98 dc 0 ac 0 pwl (0s 1720.0a 692s 1726.0a 1385s 1716.0a 2077s 1720.0a 2770s 1726.0a 3463s 1724.0a 4155s 1712.0a 4848s 1720.0a 5540s 1724.0a 6233s 1718.0a 6925s 1728.0a 7618s 1718.0a ....)
...
c01  1 0 [6926.0 6233.4 7618.6] ic= 89.974
r01  1 2 [0.16661 0.149949 0.183271]


However, I've never seen this kind of syntax with square brackets (it neither seems to be supported by Micro-Cap). My guesses for this syntax are:


Parameters value to be swept in simulation. If this is the case then I'd expect the simulator to sweep the value of \$r01\$ for each value of \$c01\$
As suggested by Andy Aka this could be a part of Monte-Carlo analysis syntax. However, if there are no additional Monte-Carlo commands in this file - I'd say that this is not the case.
Some kind of randomization syntax - the value of the component will be generated randomly from the distribution characterized by the numbers in the brackets.


I can try to narrow down the options (or provide additional ones) if you provide some more information.

Hope this helps.