elongative
/ɛlɒŋˈgeɪ.tɪv/Definitions
1. adjective
tending or having the power to cause elongation, or something that is elongated
“The elongative growth of the plant was slowed down due to lack of water.”
2. noun
a morphological process of word formation that involves the elongation of a root or stem
“Elongative forms of nouns in the language are often used to indicate their grammatical function.”