| Acronym | Definition |
|---|
| ICSI | Institute for Clinical Systems Improvement |
| ICSI | Introduction to Computer Science (course) |
| ICSI | Intracytoplasmic Sperm Injection |
| ICSI | Intra-Cytoplasmic Sperm Injection |
| ICSI | Institute of Company Secretaries of India |
| ICSI | International Computer Science Institute (Berkeley, CA) |
| ICSI | International Conference on Silicon Epitaxy and Heterostructures |
| ICSI | International Computer Science Institute |
| ICSI | International Certification Services, Inc. (Glencoe, MN) |
| ICSI | International Commission on Snow and Ice |
| ICSI | Institut Canadien de la Santé Infantile (Canadian Institute of Child Health) |
| ICSI | Institute for Clinical Systems Integration |
| ICSI | International Consumer Support for Infertility (Newington, NSW, Australia) |
| ICSI | I Can't Stand It |
| ICSI | Institute on Church and Social Issues (est. 1984; Quezon City, Philippines) |
| ICSI | Interdepartmental Committee on Security and Intelligence (Canada) |
| ICSI | Irish Coalition of Service Industries (Ireland) |
| ICSI | Integrated Circuit Solution Incorporation |
| ICSI | Imperfect Channel State Information |
| ICSI | Instantaneous Channel-State Information |