System Glossary
 Glossary Search for preopercle (Search Options)

Definition of Term

preopercle (View picture)
(English) A boomerang-shaped bone whose edges form the posterior and lower margins of the cheek region; the most anterior of the bones comprising the gill cover. It bears the upper part of the preoperculo-mandibular lateral line canal. It may bear spines or fine teeth. It belongs to the suspensorium rather than the opercular series and acts to prevent the suspensorium from moving laterally. The upper vertical margin is sometimes called the upper limb, and the lower horizontal edge is called the lower limb; the two limbs meet at the angle of the preopercle. (See also: operculum, preoperculum, opercle)
préopercule (View picture)
(French) Os en forme du boomerang dont les bords forment les bords postérieurs et inférieurs de la région de la joue ; le plus antérieur des os de la plaque operculaire. Le bord vertical est quelquefois appelé la branche supérieure. (See also: operculum, preoperculum, opercle)
preopérculo (View picture)
(Portuguese) Osso em forma de bomerangue, as margens formam as margens da região postero-inferior do queixo. (See also: operculum, preoperculum, opercle)

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