One of the mysteries of the English language finally explained.
A membranous sheath enveloping or lining an organ.
covering, cover, case, casing, envelope, sleeve, wrapperView synonyms
- ‘Veins typically have 3 layers: tunica intima, media, and adventitia.’
- ‘Arterial calcification most commonly involves the tunica media.’
- ‘The tumor seemed to infiltrate the tunica albuginea and the rete testis, as well as the root of the epididymis.’
- ‘Muscle fibers arranged in various striae form the tunica media of veins, for example, in medium-sized vessels.’
- ‘The tumor completely encased the right coronary artery with external compression of the vessel wall without invasion into the tunica media.’
The outer layer or layers of cells in an apical meristem, which contribute to surface growth.
Late 17th century: from Latin, literally ‘tunic’.
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