Water pore see hydropore

Waterston's organ (ARTHRO: Insecta) In Hymenoptera Cera-phronidae, a medial patch of reticulum on the 5th gastric tergite; function unknown.

water vascular system (ECHINOD) A unique system comprised of tube-like body wall appendages (tube-feet), and a system of canals derived from the coelom.

wax n. [A.S. weax, wax] (ARTHRO: Insecta) A substance secreted by various insects consisting of a complex mixture of lipids, varying from species to species.

wax gland Any gland in various parts of the body that secrete a waxy product in the form of a scale, string or powder.

wax layer (ARTHRO: Insecta) Wax secreted by oenocytes at or near the surface or incorporated into the inner layers of the cuticle; responsible for waterproofing the cuticle.

wax-plate (ARTHRO: Insecta) A plate where the secretions of the wax glands are deposited.

wax scale (ARTHRO: Insecta) In Apis, thin plates of wax secreted from the intersternal pockets of younger worker bees.

web n. [A.S. webb] (ARTHRO) A network of threads spun by spiders, mites and some insects.

weighting n. [A.S. gewiht, weight] An evaluation of phyletic content of a character and the evaluation of its probable contribution to a sound classification.

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