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microcapsule
microcapsule n. 
/ˈmʌɪkrə(ʊ)ˌkapsjᵿl/, /ˈmʌɪkrə(ʊ)ˌkaps(ə)l/, /ˈmaɪkroʊˌkæpˌs(j)ul/ a very small capsule, used esp. to provide controlled release of dyes, drugs, etc.
Brit. /ˈmʌɪkrə(ʊ)ˌkapsjuːl/
, /ˈmʌɪkrə(ʊ)ˌkapsjuːl//ˈmʌɪkrə(ʊ)ˌkapsjᵿl//ˈmʌɪkrə(ʊ)ˌkaps(ə)l/U.S. /ˈmaɪkroʊˌkæps(ə)l/
, /ˈmaɪkroʊˌkæps(ə)l//ˈmaɪkroʊˌkæpˌs(j)ul/ΘΚΠ
society > occupation and work > equipment > receptacle or container > [noun] > small
capsule1652
cistula1699
microcapsule1961
1961 New Scientist 20 Apr. 115/3 The National Cash Register Company first developed microcapsules of a dye in a colourless form, which were spread on paper.
1964 Science 23 Oct. 524/1 Artificial microcapsules..can be made simply and in large numbers, and..enzymes and other proteins locked into these particles retain useful biological activity.
1972 Chem. Processing Apr. 21/2 Wass, Pritchard have developed a dry system for the application of fragrance or flavour microcapsules during the printing process.
1990 L. H. Tribe Abortion 213 Injectable microspheres and microcapsules..provide a constant dose of a contraceptive hormone over several months.
2000 Jrnl. Immunol. Methods 237 85 Specific quantities of proteins introduced into cells by microcapsules.
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