velum's Usage Examples:

29, 30) as an open pit at the base of the velum, on its subumbral side.

The manubrium bearing the gonads is mouthless, and the umbrella is without tentacles, sense-organs, velum or radial canals.

Head broad, surrounded by a funnel-shaped velum or hood; no radula; dorsal appendages foliaceous.

The sub-umbrella invariably shows a velum as an inwardly projecting ridge or rim at its margin, within the circle .

The palate is long and narrow; its mucous surface has seventeen pairs of not very sharply defined oblique ridges, extending as far back as the last molar tooth, beyond which the velum palati extends for about 3 in.

Later the ciliated ring or velum disappears and seven imbricated calcareous plates, made up of flattened spicules, are formed on the dorsal surface.

The preconchylian invagination or shell-gland is formed in the embryo behind the velum, on the surface opposite the blastopore.

external epithelium is flat on the ex-umbral surface, more columnar on the sub-umbral surface, where it forms the muscular tissue of the sub-umbrella and the velum.

The circular system is developed continuously over the entire subumbral surface, and the velum represents a special local development of this system, at a region where it is able to act at the greatest mechanical advantage in producing the contractions of the umbrella by which the animal progresses.

C, Longitudinal section of mature v, Remains of volva or velum p, The pileus.

The foot arises as a prominence on the ventral surface and grows forward, and at the end of five or six days the velum atrophies and the foot becomes the organ of locomotion; the animal then ceases to swim and sinks to the bottom.

Synonyms:

flap, soft palate, uvula, palate, roof of the mouth,

Antonyms:

show, unveil, uncover, demystify, stand still,