lateral line organ

noun

1

: a system of epithelial mucus-secreting tubes in the sides of most fishes, supplied at intervals with sensory endings and considered to be responsive to low frequency vibrations

2

: one of the sensory end organs of the lateral line organ

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now