A, Five specimens of Echinorhynchus acus, Rud., attached to a piece of intestinal wall, X 4.
Acus ferrea postquam adamantem contigerit, ad stellam septentrionalem.
2 Sicut acus per naturam vertitur ad septentrionem dum sit tacta a magnete.
- Sicut acus nautica dirigit marinarios in sua navigatione.
Acus, needle, or acer, sharp), needleshaped, a term used in botany (since Linnaeus) as descriptive of the leaves, e.g., of pines.
Acus, chaff, comes also the distinct meaning of "mixed with chaff."
The root is probably ak, with the idea of sharpness or swiftness (tiepos, wxus, acus, ocior).