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submillimetric
submillimetric adj.
Brit. 
/ˌsʌbmɪlɪˈmɛtrɪk/
, /ˌsʌbmɪlɪˈmɛtrɪk/U.S. /ˌsəbˌmɪləˈmɛtrɪk/
= submillimetre adj./ˌsəbˌmɪləˈmɛtrɪk/ΘΚΠ
the world > matter > physics > electromagnetic radiation > radio wave > microwave > [adjective] > of specific length
millimetric1873
centimetric1932
submillimetre1954
submillimetric1957
1957 Electronic & Radio Engineer 34 385/1 Surface irregularities of that nature, though negligible in the centrimetric [sic.] band and even sometimes in the millimetric band, become of primary importance in the submillimetric band.
1975 Nature 6 Mar. 39/2 The mystery of the submillimetric limb brightening [of the sun].
2002 W. Etter & C. M. Tang in D. J. Bottjer et al. Exceptional Fossil Preserv. xv. 269 The submillimetric laminations are an alternation of light-colored carbonate-rich laminae..and darker laminae.
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