Of the nature or substance of shells; shelly; consisting of a shell or shelly material.

Zoology. Originally: designating a bivalve shell having the valves joined by a hinge comprising a number of interlocking projections or teeth; (of a…

Divided into compartments by tabulæ.

Zoology. Divided into chambers, as a chambered shell.

= costate, adj.

Marked with or having ribs or ridges. Of leaves, other plant parts, mollusc shells, etc.

Zoology and Botany. Having more than two valves. Of molluscs and crustaceans (e.g. chitons and barnacles). Cf. valve, n.1 2. Obsolete.

Conchology. Provided or connected with, of the nature of, an umbilicus.

= multivalve, adj. 1a.

Characterized by very fine fracture, so as to resemble or suggest hairs or fine filaments.

Conchology. Of a gastropod shell. Having the opening to the right when the apex points downwards; = sinistral, adj. 7a(a). Now rare.

Swelling out in the middle, or on one side, after the manner of an animal's belly; bellied… Conchology. (Usually of the body of the shell.)

(un-, prefix1 affix 1.)

Conchology and Zoology. Of a spirally coiled shell of a gastropod mollusc: having the aperture located on the left side (when the shell is held…

Of a shell, animal, or flower: having or characterized by a white lip or lips. Frequently in names of animals.

(a) having a white mouth, lips, or teeth; (b) having the mouth white with foam; foaming at the mouth.

Furnished with a turret or turrets, turreted: spec. in Conchology = turreted, adj. 2b, turrited, adj.

Of or belonging to the umbo of a shell.

Furnished with something resembling a turret: cf. turret, n. 2 3. Of natural objects; spec. of a shell with a long spire: = turrited, adj.

Possessing or furnished with a siphuncle.

Of or belonging to a columella (columella, n. 2). columellar lip n. the inner lip of a spiral shell.

Conchology and Zoology. Designating spiral mollusc shells that coil to the left (anticlockwise), and molluscs having such shells; = sinistral, adj.…

Having or bearing a canal (in various senses) or canals.

Of shells: Univalve and spiral.

= turreted, adj. 2; spec. of a shell, having a long spire resembling a tower or turret: = turreted, adj. 2b.

Conchology. Turning or curling over.

Zoology. Resembling a mitre shell.

(of a mollusc's operculum or shell) having few whorls.

= turriculated, adj.

Possessing or furnished with a siphuncle.

= ventricose, adj., in various senses.

Zoology. = camerate, adj.

Conchology. Of a shell: Having the whorls flattened out in the direction of the axis and wound on each other, so as nearly or entirely to conceal…

Conchology. Of a coiled shell: having an umbilicus. Obsolete.

Conchology. Of, situated on, or designating the inner lip or columella of a gastropod mollusc shell. Cf. palatal, adj. 3a.

Having a septum or septa; septate.

Having the form of a snail of the genus Planorbis; of the shape of a rounded plane spiral.

= planorbiform, adj.

= siphunculated, adj.

Tower-shaped.

Having a rib or ribs; ribbed; having ridges or a ridged surface. Cf. costa, n.1

Situated between loculi or chambers, as in shells or corals.

Of a shell: Marked or furnished with varices.

Of a shell: having ridges.

Zoology. Designating a spiral shell (esp. of an ammonoid or a foraminiferan) which is partly or wholly uncoiled; of or relating to such a shell.