増ぞう大だい号ごう

noun

enlarged issue; special expanded edition

Used for magazines, journals, or other periodicals that are published with extra pages or content beyond the usual format.

• 今こん月げつの科か学がく雑ざっ誌しは増ぞう大だい号ごうで、特とく集しゅうがたくさん載のっている。

  This month's science magazine is an enlarged issue, with many special features.