IUCD
abbreviation or noun
plural IUCDs
: a device inserted into and left in the uterus to prevent conception
specifically
: a T-shaped device containing either progestin or copper that is inserted into and left in the uterus to prevent conception by blocking ovulation, thickening cervical mucus, or interfering with sperm motility
Intrauterine contraceptive devices (IUCDs) provide long-acting, reversible contraception … —
Jennifer Reeves and Carrie Cwiak
Jennifer Reeves and Carrie Cwiak The effectiveness of the IUCD as a contraceptive method is approximately 99.2% to 99.8%. —Menglu Ouyang et al.
Menglu Ouyang et al. called also intrauterine contraceptive device, intrauterine device, IUD
Cite this Entry
“IUCD.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/IUCD. Accessed 3 Nov. 2025.
Copy CitationMedical Definition
IUCD
abbreviation or noun
: a device inserted into and left in the uterus to prevent conception
specifically
: a T-shaped device containing either progestin or copper that is inserted into and left in the uterus to prevent conception by blocking ovulation, thickening cervical mucus, or interfering with sperm motility
called also intrauterine contraceptive device, intrauterine device, IUD
Love words? Need even more definitions?
Merriam-Webster unabridged
Share