microdot
noun /ˈmaɪkrəʊdɒt/
/ˈmaɪkrəʊdɑːt/
- a very small photograph about one millimetre across in size, usually of a printed document
微点照片，缩微影印文件（约一毫米） - a very small round piece of a drug, especially the illegal drug LSD
超小型药丸；（尤指）小粒迷幻药