Spinous

Part of speech: adjective

Definitions

1. Having characteristics of or relating to spines or thorn-like projections in anatomy or botany ; possessing sharp, pointed structures resembling thorns or spines in physical form ; describing a texture or surface marked by stiff, pointed, spine-like features in biological contexts
2. Pertaining to parts of plants or animals that bear rigid, pointed extensions similar to spines ; exhibiting or consisting of sharp, elongated projections that provide protection or support ; used to denote structures that are thorny or spine-shaped in scientific descriptions
3. Related to spine-like or thorny projections found in organisms ; featuring pointed, stiff projections that are similar to needles or thorns ; applicable to botanical or anatomical parts that are covered with or have spine-shaped appendages

Etymology: "Spinous" is a plain formation: the noun "spine" with the adjective-forming suffix "-ous", which means "full of" or "having the character of." A spine is itself a sharp, pointed projection, so a spinous leaf or stem is one bristling with such points. The adjective is therefore a direct description of what it names, with no shift in sense between the noun and the form. The source also allows that the word was borrowed directly from Latin "spinōsus," meaning "thorny" or "full of thorns," which is built from "spina," the Latin word for thorn or backbone. The Latin root has the same range of senses as English "spine": the thorn of a plant and the backbone of an animal share one word in Latin, just as they do in English. The English adjective thus carries both a botanical and an anatomical sense, which is why it is used in botany for thorny plant parts and in zoology for animals with spiny structures.

Synonyms: spiny, thorny, prickly, pointed

Antonyms: smooth, spineless, blunt