n. In entomology, the nymph, chrysalis, or pupa of a lepidopterous insect. See chrysalis.n. [capitalized]A genus of pelagic discophorous Hydromedusæ, typical of the family Aureliidæ, characterized by having branched radial vessels and the edge of the disk fringed with small tentacles.n. The adult state of any medusa, or the perfected stage of a medusiform zoöid.