| 释义 |
nectocalyx Zool.|nɛktəˈkeɪlɪks|
Pl. -calyces.
[mod.L., f. Gr. νηκτός swimming (f. νήχειν to swim) + calyx.]
The swimming-bell which forms the natatory organ in many hydrozoans.
1859Huxley Oceanic Hydrozoa 15 The presence of the valvular membrane at once distinguishes a nectocalyx from an umbrella. 1888Rolleston & Jackson Anim. Life 773 A furrow or canal formed at the side of the distal nectocalyx.
So ˈnectosac, the interior of a nectocalyx (also called nectocyst); ˈnectosome, the upper portion of a siphonophore, bearing the natatory organs; ˈnectostem, the axis of a series of nectocalyces.
1859Huxley Oceanic Hydrozoa 15 The cavity of the cup, which, with its muscular wall, may be termed the nectosac. 1870H. A. Nicholson Man. Zool. 85 The interior of the nectocalyx is often called the ‘nectosac’. 1888Stand. Nat. Hist. I. 99 Just below the float on the nectostem there is a small cluster of minute buds in which can be found nectocalices of all sizes. 1898Sedgwick Text-bk. Zool. I. 139 The nectosome, to which the swimming organs (nectocalyces and pneumatophores) are attached. |