dekad

Borrowed from Ancient Greek δεκάς (dekás, “group of ten”). By surface analysis, deka- +‎ -ad.

dekad (plural dekads)

1. (climatology) Ten days, especially of rainfall
   • Africa InterTropical Front (ITF), in Climate Prediction Center ^{https://www.cpc.ncep.noaa.gov/products/international/itf/itcz.shtml ,NOAA , accessed 20:43, 5 May 2022 (UTC)}

   Figure 1 displays the current position of the ITF relative to the long-term average position during the 3rd dekad of April and its previous position during the 2nd dekad of April.

• dekadal

• pentad

From English decade, from Middle English, from Middle French decade, from Late Latin decas (“(set of) ten”), from Ancient Greek δεκάς (dekás), from δέκα (déka, “ten”).

• IPA^(key): /ˈdekad/ [ˈde.kat̪̚]
• Rhymes: -ekad, -ad
• Hyphenation: de‧kad

dékad (plural dekad-dekad)

1. decade (a period of ten years)

• dékadê (Indonesian)

• “dekad” in Pusat Rujukan Persuratan Melayu | Malay Literary Reference Centre, Kuala Lumpur: Dewan Bahasa dan Pustaka, 2017.