waktu paruh

Compound of waktu (“time”) +‎ paruh (“half”), calque of Dutch halveringstijd (“half-life”, literally “halving time”).

• IPA^(key): /ˈwaktu ˈparʊh/

waktu paruh (plural waktu-waktu paruh, first-person possessive waktu paruhku, second-person possessive waktu paruhmu, third-person possessive waktu paruhnya)

1. half-life:
   1. (nuclear physics) The time required for half the nuclei in a sample of a specific isotope to undergo radioactive decay.
   2. (chemistry) In a chemical reaction, the time required for the concentration of a reactant to fall from a chosen value to half that value.
   3. (medicine, pharmacology, radiology) The time it takes for a substance (drug, radioactive nuclide, or other) to lose half of its pharmacological, physiologic, or radiological activity.

• separuh hayat (Standard Malay)

• paruh waktu (“part-time”)

• “waktu paruh” in Kamus Besar Bahasa Indonesia, Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016.