(in former classifications) any coelenterate of the group Acalephae, including the sea nettles and jellyfishes.
Perhaps they too act like the venomous matter produced in the thread-capsules of the acaleph.
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index Ernst Haeckel
And throughout considerable portions of their bodies, some of the acaleph exhibit more or less distinctly this type of structure.
Illustrations of Universal Progress Herbert Spencer
The medus are often termed the acaleph—a word which signifies nettles, and they are popularly known as sea nettles.
The Sea Shore William S. Furneaux
The color of this pretty acaleph varies from a greenish hue to green, with a faint tinge of red, or to a reddish brown.
Seaside Studies in Natural History Elizabeth Cabot Cary Agassiz
It exists occasionally in considerable numbers on the internal surface of some acaleph of the ocean and of the Mediterranean.
Animal Parasites and Messmates P. J. Van Beneden
(obsolete) any of the coelenterates of the former taxonomic group Acalephae, which included the jellyfishes
acam American College for Advancement in Medicine
acampsia acampsia a·camp·si·a (ə-kāmp’sē-ə, ā-kāmp’-) n. Stiffening or rigidity of a joint.
a combining form from Greek meaning “spine,” used in the formation of compound words: acanthocephalan. combining form indicating a spine or thorn: acanthocephalan acantho- or acanth- pref. Thorn; spine; spinous process: acanthocyte.
acantha acantha a·can·tha (ə-kān’thə) n. pl. a·can·thae (-thē) A sharp spiny part or structure, such as the spinous process of a vertebra.