head shield

head shield

[′hed ‚shēld]
(invertebrate zoology)
A conspicuous structure arching over the lips of certain nematodes.
References in periodicals archive ?
Our Purple Swamphen is a big bird some 45 cm long, bright purple throughout with a green back and bright crimson legs and bill -- including a stonking great head shield.
In the wake of an accident in Cornwall, Ontario, in 1999, the Transportation Safety Board of Canada (TSB) concluded, "In general, Class 111A tank cars do not have sufficient protection against punctures, even in a low-speed impact, due to the thinness of the tank shell and the absence of a head shield.
Surprisingly well are represented also such bones of the head shield as nuchal (Nu), lateral (La) and premedian (Prm) plates, and even complete head shields form 21.
They include an unnamed worm; Stanleycaris hirpex, a segmented shrimplike critter known as an anomalocarid; and an arthropod with big eyes dangling on stalks from its head shield.
Chief Large Stockman features genuine coffee-bone handle scales, 440 stainless steel bolsters, liners, pins, blades and a detailed Indian head shield.
Meanwhile, an officer attacked in Mountjoy needs surgery after he was hit by a missile that went through his head shield, shattered his teeth and damaged the bridge of his nose.
Welders wear protective clothing including head shield with protective glass, overalls, apron and gloves.
The notochord penetrated the brain case to the level of the pituitary gland, and a series of extrascapular dermal shoulder girdle bones were attached to the dermal head shield.
We were talking about putting a head shield on the master cylinder.
Overalls, steel toe-capped boots, leather apron, head shield and leather gloves are all essential kit.