ultraminiature

ul·tra·min·i·a·ture

U0011800 (ŭl′trə-mĭn′ē-ə-cho͝or′, -chər, -mĭn′ə-)adj. Subminiature.
ul′tra·min′i·a·tur·ize′ (-īz′) v.ul′tra·min′i·a·tur·i·za′tion (-chə-rĭ-zā′shən) n.

ultraminiature

(ˌʌltrəˈmɪnɪtʃə) adjextremely small

sub•min•i•a•ture

(sʌbˈmɪn i ə tʃər, -ˌtʃʊər, -ˈmɪn ə tʃər)
adj. smaller than miniature, as certain electronic components. [1945–50]