noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An organic microfossil: a particle of 5–500 micrometers in diameter, found in sedimentary deposits and composed of organic material.
2. 2
   Any spore (derived from fungi, algae or spore-bearing embryophytes) or pollen grain (derived from seed-bearing embryophytes).

Etymology

From palyno- + -morph.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.