UNIQUE WORDS game to increase our vocabulary - alphabetical order

Reptation -  is the thermal motion of very long linear, entangled macromolecules in polymer melts or concentrated polymer solutions. Derived from the word reptile, reptation suggests the movement of entangled polymer chains as being analogous to snakes slithering through one another. 

(from Google search)

 Helo_Mek_in_Vegas:

Quadraphonic - of, noting, or pertaining to the recording and reproduction of sound over four separate transmission or direct reproduction channels instead of the customary two of the stereo system

Just now realized what I did, thanks for taking Q.

S 

Saccade - A saccade is a twitching, jerking movement, particularly of the eyeball. And if you’re saccadic, then you’re restless and fidgety. 

xerophytism - the natural adaptation of plants living under desert or marsh conditions to store water internally. — xerophyte, n. — xerophytic, adj.

Zeta - the sixth letter, a number value of 7, in names---it means born last

chlamys

horseman's loose cloak