Definition

Adjective: * Having a shell that grows in a continuous and gradually widening curve around a central axis. This describes the physical structure of certain mollusk shells, such as those of snails and some cephalopods like the nautilus.

Usage

The word "spiral-shelled" is a descriptive, compound adjective used almost exclusively in biological or zoological contexts to classify and describe animals, primarily gastropods (like snails) and some cephalopods. It is typically placed before a noun.

Examples

• The spiral-shelled snail retreated into its protective home.
• Nautiluses are ancient, spiral-shelled cephalopods.
• The beach was littered with the empty, spiral-shelled remains of sea snails.

Advanced Usage

• The term can be used in a more figurative or descriptive sense in literature or art to describe any object that resembles such a shell.
  • The artist created a beautiful, spiral-shelled sculpture from bronze.

Variants and Related Words

• Spiraled (adj.): Coiled in a spiral. (More general, not specific to shells).
• Coiled (adj.): Arranged in a series of loops. (More general).
• Helical (adj.): Having the shape or form of a helix; spiral. (More technical).
• Gastropod (n.): The class of mollusks which includes snails and slugs, most of which are spiral-shelled.

Synonyms

• Coiled-shelled
• Helicoid (in specific technical contexts)

Antonyms

• Univalve (This is a noun describing a gastropod with a single shell, which is typically spiral, so it is a related term rather than a direct antonym. A true conceptual antonym would be bivalve (having two hinged shells) or shell-less).

Adjective

1. having a shell that forms a spiral