Axopodia

Part of speech: noun

Definitions

1. Slim, needle-like projections extending from certain single-celled organisms used for capturing food and locomotion
2. microscopic cytoplasmic extensions serving in prey capture and movement in some protists
3. elongated cellular appendages found in some protozoa that function to aid in feeding and environmental interaction

Etymology: Axopodia are the plural of "axopodium", the thin, stiff, needle-like extensions that certain single-celled organisms, such as heliozoans (sun animalcules), use to capture food and sense their surroundings. The singular "axopodium" is built from two Greek-derived parts: "axo-", from the Greek "axon", meaning "axis" or "axle", and "-podium", from the Greek "pous" (genitive "podos"), meaning "foot". Together they describe a "foot" organized around a central axis. The axle-like core is the key to the name. Each axopodium contains a bundle of microtubules running along its length, forming a rigid central shaft, and the cell can pull material along it or retract it. The "-podium" element is shared with other biological terms such as "pseudopodium", the broader and more flexible false foot used by amoebae, which is why the two terms are often compared.

Synonyms: axopod, axopodial projection