Definition
An acicula, in botany, refers to a small, needle-like structure, such as a spine or prickle on a plant. In zoology, it can refer to a needle-like bristle or spine in certain invertebrates. Think of a tiny, sharp point, like a miniature version of a cactus spine. It's a biological term used to describe small, pointed anatomical features. While not as common as 'spine' or 'prickle,' it provides a more precise description in scientific contexts.