CLIMACTIC
climactic
(adjective) consisting of or causing a climax; “a climactic development”
Source: WordNet® 3.1
Adjective
climactic (comparative more climactic, superlative most climactic)
Of, pertaining to, or constituting a climax; reaching a decisive moment or point of greatest tension.
• The race ended in a climactic, neck-and-neck scramble for the finish line.
Usage notes
• Do not confuse with climatic, which relates to climate.
Source: Wiktionary
Cli*mac"tic, a.
Definition: Of or pertaining to a climax; forming, or of the nature of, a
climax, or ascending series.
A fourth kind of parallelism . . . is still sufficiently marked to be
noticed by the side of those described by Lowth, viz., climactic
parallelism (sometimes called "ascending rhythm").
S. R. Driver.
Source: Webster’s Unabridged Dictionary 1913 Edition