Concentric – Shorten, and referring to movement up towards the sky

(Pronounced kon-sen-trik)

To remember what concentric means use the following mnemonic:

Concentrating is not an easy trick (concentric) when you are staring at the shorts of ten (shorten) gorgeous men. 

And to remember it's up:

Relate the first letter of concentric to

C = Look up to the Clouds

C = Up

In Summary 

Concentric = Shorten

Concentric = Up 

Concentric would be shortening of a muscle and is usually associated with a movement upwards. 

An example of a concentric contraction would be moving a dumbbell up to the body. Up being the memorable word.