Source:http://linkedlifedata.com/resource/umls/id/C1522053
NCI: This term describes an experiment in which probes representing genes that one wants to study are affixed to a substrate (e.g., a glass slide) and then exposed to target molecules (sometimes referred to as the sample). The level of hybridization between a specific probe and a target (typically indicated through fluorescence and measured through image analysis) indicates the level of the gene corresponding to that probe in a test solution. (from CHI Outlook Microarrays report)