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n. pl. rad·u·lae (-lē′)
A flexible tonguelike organ found in most mollusks, having rows of horny teeth on the surface and used in feeding for scraping or cutting.

[Latin rādula, scraper, from rādere, to scrape; see rēd- in Indo-European roots.]

rad′u·lar adj.


n, pl -lae (-ˌliː)
(Zoology) a horny tooth-bearing strip on the tongue of molluscs that is used for rasping food
[C19: from Late Latin: a scraping iron, from Latin rādere to scrape]
ˈradular adj


(ˈrædʒ ʊ lə)

n., pl. -lae (-ˌli)
a tonguelike band in the mouth of most gastropods, set with rows of teeth.
[1745–55; < New Latin rādula; Latin: scraper =rād(ere) to scrape, rub + -ula -ule]
rad′u•lar, adj.
References in periodicals archive ?
Then, microorganisms get stuck in the web, and the snails use their mouths to pull the web back in and strain the food through barbs on their tongues called radulae in order to eat.
Although numerous papers have described the morphology of radulae in adults, changes in the morphology of the radula during development from postlarvae to adult have only been published on other vetigastropods (Waren 1990, Geiger et al.
Specimens collected in the field and obtained from Stellar Biotechnologies at body sizes ranging from <1 mm to 12 cm were dissected and radulae were processed for scanning electron microscopy (SEM).
Scanning electron microscopy under a Phillips XL 30 was used to study the radulae, with the usual coating, at the Laboratorio de Microscopia Eletronica, Museu de Zoologia da USP, and Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" (MACN).
Here we present new codable morphological characters of two genera in the Solenogastres family Dondersiidae (see Table 2), both for body shape and isolated hard parts--sclerites, radulae, and copulatory spicules--and for internal anatomic characters, particularly those broadly applicable to Solenogastres.
Radulae measure one third of the specimen's length, comprising between 26 to 31 rows of mature teeth and the major lateral teeth mineralized, another 8 to 11 rows of teeth in formation.
Feeding patterns of Fissurella species on Isla de Margarita, Venezuela: use of radulae and food passage rates.
It was resolved to some extent by McLean's synonymy which recognized 13 species from a previous total of 58 names based on characters of the shells, epipodium, and in some cases radulae, complemented by data on their geographic distributions.
The radulae of Truncatella from Japan (Gastropoda).
Given this, it is expected that smaller individuals would have disproportionally longer radulae than larger snails.
Radulae were obtained by maceration of the buccal mass in 5% KOH at 60[degrees]C until the soft tissue appeared dissolved, after which the radula was rinsed with distilled water.
All radulae examined have a hook-shaped innermost lateral tooth in each half-row, with a short, triangular cusp and a secondary cusp mid-length (Figure 3).