As hayofstacks said, there is no standard for naming motors.
If we had a link to a specific motor we could help you understand THAT motor.
TowerPro Brushless Outrunner 2410-08T 890kv
I would have guessed that the diamager of the motor housing was 24 mm and the length of the housing was 10 mm and the stator had 8 turns. The 890 kv is clear.
But then I look at the specs and none of this is born out:
For 2-3 Li-Poly Cells (7.2-12.6V)
Recommended props: 9 x 4.7, 10 x 4.7, 11 x 4.7 Slow Flyer
31 mm diameter x 46.5 mm length
Maximum current: 12A
Weight: 66.7 grams / 2.35 oz (everything shown in picture including gray gear box housing)
Comes with stick mount plastic frame
Firewall mount capable
Comes with two prop nuts and one washer
3mm shaft diameter
10mm x 10mm stick mount
12 Stator Poles, 14 Magnets
After looking at the specs for the motor I can find no real relationship between the name/number and the specs. Here is an additional spec table.
Kv (rpm/v)890Weight (g)66Max Current (A)12Resistance (mh)0Max Voltage (V)11Power(W)0Shaft A (mm)-Length B (mm)35Diameter C (mm)31Can Length D (mm)10Total Length
Well, length D (see diagram at the link) seems to match up with a 10 in the name, but nothing else does.
Can you find any relationship to this 2410-08 and any of the specs? I can't.