ceramidium Bot.
(sɛrəˈmɪdɪəm)
[mod.L., f. Gr. κεραµίδιον, dim. of κεραµίς earthen vessel.]
The outer covering of the cystocarp, found in algæ of the family Rhodomelaceæ.
| 1849 W. H. Harvey Man. Brit. Marine Algæ (ed. 2) 69 In the ceramidium the conceptacular fruit is brought to its highest development. This organ is ovate or urn-shaped, furnished with an apical pore, and containing a tuft of pear-shaped spores, rising from the base of the cavity. 1902 Encycl. Brit. XXV. 270/1 In Rhodomelaceæ there is a special urn-shaped envelope surrounding the sporogenous filaments. This is a ceramidium. |