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pico-kelvin
pico-kelvin n. 
/ˈpʌɪkə(ʊ)ˌkɛlvɪn/, /ˈpikəˌkɛlv(ə)n/, /ˈpaɪkoʊˌkɛlv(ə)n/, /ˈpaɪkəˌkɛlv(ə)n/
Brit. /ˈpiːkə(ʊ)ˌkɛlvɪn/
, /ˈpiːkə(ʊ)ˌkɛlvɪn//ˈpʌɪkə(ʊ)ˌkɛlvɪn/U.S. /ˈpikoʊˌkɛlv(ə)n/
, /ˈpikoʊˌkɛlv(ə)n//ˈpikəˌkɛlv(ə)n//ˈpaɪkoʊˌkɛlv(ə)n//ˈpaɪkəˌkɛlv(ə)n/ΚΠ
1990 Sci. Amer. June 64/1 In laboratories..temperatures measured in nanokelvins and picokelvins are being achieved.
2003 Science 12 Sept. 1513 This lowered the peak condensate density to 5 × 1010 atoms per cubic centimeter and cooled the entire cloud..to a kinetic temperature of 450 ± 80 picokelvin.
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