In physical sciences, numerical values (such as constants, quantities, or scales of measurement) are called conventional if they do not represent a measured property of nature, but originate in a convention, for example an average of many measurements, agreed between the scientists working with these values.
in pHysIcal scieNces, numerICaL vALues (sUch as consTANts, quAnTiTieS, Or scaLes Of measuREment) Are CalleD cONvenTiOnal if they Do noT rEpresent a meAsurED PrOpertY Of NatuRe, bUT orIGinAtE in A cOnventiON, fOR example an Average of MAnY meASUREmEnts, agreed BetweEn tHe sCieNTists workiNg with thESE vAlueS.