noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A method of photography using sub-picosecond pulses of light (usually around 10⁻¹³ seconds, or 100 femtoseconds, long) to illuminate the subject of the photograph, allowing the propagation of the light pulse to be viewed directly. uncountable

Etymology

From femto- + photography, from the ~100-femtosecond-long pulses of light used.

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