Used to introduce a precise or technically accurate statement, often correcting a looser or more common understanding. Similar to 厳密に言うと.
See also: 厳密に言うと
Strictly speaking, this is not a mammal.
Strictly speaking, his explanation is wrong.
Standard kanji spelling for this fixed expression.
Kana spelling of 言う in this expression; less formal but still common.
A conditional phrase formed from 厳密 (strict, precise) + に (adverbial particle) + 言う (to say) in its conditional form 言えば.