subminiature

[ suhb-min-ee-uh-cher, -choo r, -min-uh-cher ]
/ sʌbˈmɪn i ə tʃər, -ˌtʃʊər, -ˈmɪn ə tʃər /

noun

adjective

noting or pertaining to subminiature cameras, their accessories, or systems of photography.
smaller than miniature, as certain electronic components; ultraminiature.

Origin of subminiature

First recorded in 1945–50; sub- + miniature

British Dictionary definitions for subminiature

subminiature
/ (sʌbˈmɪnɪətʃə) /

adjective

smaller than miniature