tumbling

Verb (usu participle)

tum=bling

WORDNET DICTIONARY

tumbling(n = noun.act) acrobatics - the gymnastic moves of an acrobat; Array

is a kind of gymnastic exercise, gymnastics

has parts: acrobatic feat, acrobatic stunt

Derived form verb tumble₁₁

tumbling, a. & vb. n.

a. & vb. n. from Tumble, v. [1913 Webster]

Tumbling barrel. Same as Rumble, n., 4. -- Tumbling bay, an overfall, or weir, in a canal.