ACEROSE (from Lat. acus, needle, or acer, sharp), needle-shaped, a term used in botany (since Linnaeus) as descriptive of the leaves, e.g., of pines. From Lat. aeus, chaff, comes also the distinct meaning of "mixed with chaff."
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)