There are multiple definitions:
Old Age and Survivor's Insurance(English)
- Trust Fund that is the account maintained in the US Treasury to pay monthly retirement benefits (sometimes called your “Social Security pension”) and survivor's benefits (sometimes called a “widow's pension” or widower's, as the case may be
- OASDI
- Aging, Health insurance
- https://doi.org…387-33754-8_321
obstetric anal sphincter injury(English)
- severe tearing of the perineum during vaginal birth, affecting the anal sphincter muscles (third/fourth-degree tears), common in first births and instrumental deliveries, potentially causing long-term anal incontinence, pain, and sexual dysfunction, requiring careful diagnosis, repair, and specialized care to prevent complications and improve outcomes
- Obstetrics, Injury, Myocyte / muscle, Surgery, Post-traumatic state
- https://doi.org…1471-0528.17878
- https://doi.org…bcr-2022-253922