Learn how to say Plumule correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word plumule:
1 Botany the rudimentary shoot or stem of an embryo plant.
2 Ornithology a bird’s down feather, numbers of which form an insulating layer under the contour feathers.
early 18th century: from French plumule or Latin plumula ‘small feather’, diminutive of pluma ‘down’