- plural of
- A little spike; a spikelet.
- 1861, Various, Atlantic Monthly, Volume 8, No. 47, September, 1861:
- And yet Thoreau camps down by Walden Pond and shows us that absolutely nothing in Nature has ever yet been described,--not a bird nor a berry of the woods, nor a drop of water, nor a spicula of ice, nor summer, nor winter, nor sun, nor star.
- 1906, John Tyndall, Six Lectures on Light:
- Introducing the alum-cell, and placing the coating of hoar-frost at the intensely luminous focus of the electric lamp, not a spicula of the dazzling frost is melted.
- A pointed fleshy appendage.
- 1904, John Morley, Critical Miscellanies, Vol. 1, Essay 5, Emerson:
- Nature 'publishes itself in creatures, reaching from particles and spicula, through transformation on transformation to the highest symmetries.