rostellum

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rostellum

 [ros-tel´um]
a small protuberance or beak, especially the fleshy protuberance of the scolex (mouth) of a tapeworm, which may or may not bear hooks.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ros·tel·lum

(ros-tel'ŭm),
The anterior fixed or invertible portion of the scolex of a tapeworm, frequently provided with a row (or several rows) of hooks.
[L. dim. of rostrum, a beak]
Farlex Partner Medical Dictionary © Farlex 2012

rostellum

(rŏ-stĕl′əm)
n. pl. rostella (rŏ-stĕl′ə)
A small beaklike part, such as a projection on the stigma of an orchid or the hooked projection on the head of a tapeworm.

ros·tel′lar adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ros·tel·lum

(ros-tel'ŭm)
The anterior fixed or invertible portion of the scolex of a tapeworm, frequently provided with a row (or several rows) of hooks.
[L. dim. of rostrum, a beak]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

rostellum

  1. a protruding, beak-like structure in some insects.
  2. the protrusion carrying the hooks on the SCOLEX of tapeworms.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Armed (containing rostellar hooks) cysticerci of Taenia spp.
A major question is the relationship between the northern strain and other unarmed (no rostellar hooks) Taenia spp.
A) Scolex showing the lack of a rostellar hook crown in the middle of the scolex, which is a synapomorphy in T.
Luhe noted that most of the specimens had lost their rostellar hooks but that they were still present in some organisms (Figure 2).
The authors extensively described the protoscolices and the amount and shape of the rostellar hooklets they found.