Lumpy Clouds That Form Under a Thunderstorm
This page is the CodyCross answer for the clue below from Photography, Group 2013, Puzzle 2 (Photo Capture).
Question is: Lumpy Clouds That Form Under a Thunderstorm
and the answer is: MAMMATUS
Word Meaning:
MAMMATUS — Ellipsis of mammatus cloud.
Definitions from Wiktionary.