The ventricose gullet of an insect.    From Wordnet, Princeton University. 

Campanulate: bell-shaped: more or less ventricose at the base and a little recurved at the margin.    From Wordnik.com.  [Explanation of Terms Used in Entomology] Reference

+Stem+ 2 to 4 inches long, ¾ to ½ inch thick, swollen in the middle (ventricose), covered with a bloom.    From Wordnik.com.  [Among the Mushrooms A Guide For Beginners] Reference

+Gills+ free, ventricose, narrowing at both ends, thin, first a pink color, then afterward brown or blackish-brown.    From Wordnik.com.  [Among the Mushrooms A Guide For Beginners] Reference

They are narrow or wide, swell out in the middle (ventricose), are curved like a bow (arcuate), and have a sudden wave or sinus in the edge near the stem (sinuate).    From Wordnik.com.  [Among the Mushrooms A Guide For Beginners] Reference

In the second section, the ascidia are ventricose and reclinate, with the operculum free, and arched over the aperture of the tube.    From Wordnik.com.  [Transactions of the American Philosophical Society] Reference

N.S. -- (Fig. 111.) Shell thick, spire rather short, conical; whirls eight rounded and somewhat ventricose, and ornamented by numerous.    From Wordnik.com.  [Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds] Reference

The = gills = are adnate, slightly sinuate, and decurrent by a tooth, easily separating from the stem, rather crowded, slightly ventricose.    From Wordnik.com.  [Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.] Reference

The stem varies considerably in length and shape, being rarely ventricose, and then only at the base; the bulbous forms predominate and the bulb is often very large.    From Wordnik.com.  [Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.] Reference

(Fig. 225.) Shell rather large, thin, sub-oval, inequivalve, sub-ventricose, marked with rather obscure radiating lines, and impressed with an oblique fold in each valve.    From Wordnik.com.  [Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds] Reference

The = stem = is clavate, pale cream buff in color, solid, becoming irregularly fistulose in age, bulbous or somewhat ventricose below, the bulb often large and abrupt, 1.5 -- 3 cm. in diameter.    From Wordnik.com.  [Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.] Reference

The = gills = are sinuate, adnate, somewhat ventricose, very rarely in abnormal specimens anastomosing near the margin of the pileus, at first light yellowish, then shading to umber and spotted with black and rusty brown as the spores mature, easily breaking away from the stipe, whitish on the edge.    From Wordnik.com.  [Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.] Reference

(Fig. 140.) "Shell fusiform, ventricose; whirls compressed above, spirally and transversely striated; striae wrinkled and coarse at base; spire short and sub-cancellated, papillated; aperture semi-lunar; outer lip acute, smooth within; columella lip very thin, decumbent, almost obsolete, semi-callous, not distinguishable from the body-whirl, but by outline and color.    From Wordnik.com.  [Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds] Reference

+Gills+ gray color, adnexed, distant, ventricose.    From Wordnik.com.  [Among the Mushrooms A Guide For Beginners] Reference

And in the level wet savannas grew plentifully a new and very elegant species of Saracinia (Saracinia lacunosa) the leaves of this plant, which are twelve or fourteen inches in length, stand nearly erect, are round, tubular and ventricose; but not ridged with longitudinal angles or prominent nerves, as the leaves of the Saracinia flava are; the aperture at top may be shut up by a cap or lid, of a helmet form, which is an appendage of the leaf, turning over the orifice in that singular manner, the ventricose, or inflated part of the leaf, which is of a pale, but vivid green colour, is beautifully ornamented with rose coloured studs or blisters, and the inner surface curiously inscribed, or variegated with crimson veins or fibres.    From Wordnik.com.  [Travels Through North & South Carolina, Georgia, East & West Florida, the Cherokee Country, the Extensive Territories of the Muscogulges, or Creek Confederacy, and the Country of the Chactaws; Containing An Account of the Soil and Natural Productions of Those Regions, Together with Observations on the Manners of the Indians.] Reference