Spiculum is a Latin word meaning "a small, pointed object." There are several synonyms for this word, including spike, prickle, thorn, needle, and barb. These words all describe a small, sharp object that can be used for various purposes. For example, spikes are often used to deter animals or people from entering an area, while needles are used for sewing or medical purposes. Prickles and thorns are often found on plants and can be used for defense or to help with attachment to other surfaces. And barbs are often found on fishing hooks or arrows, allowing them to stick to their target.