What is the meaning of Eruptive?

That erupts or bursts forth.

Accompanied by eruptions.

Produced by eruption.

An eruptive rock, one produced by eruption.

inflection of eruptiv:

1. strong/mixed nominative/accusative feminine singular
2. strong nominative/accusative plural
3. weak nominative all-gender singular
4. weak accusative feminine/neuter singular

strong/mixed nominative/accusative feminine singular

strong nominative/accusative plural

weak nominative all-gender singular

weak accusative feminine/neuter singular

Source: wiktionary.org