Used to introduce a precise or technically accurate statement, often to correct a looser assumption. Similar to 厳密に言えば.
See also: 厳密に言えば
Strictly speaking, this is not a mammal.
Standard kanji spelling for the phrase.
Kana spelling of the verb part; common in informal writing.
Phrase composed of 厳密 (strict, precise) + に (adverbial particle) + 言う (say) + と (conditional particle).