Category: P

Shaped like a prism, a long solid with flat faces separated by angles. Having three or more angles bounding flat or hollowed sides.  

(In taxonomy), the principle that the first name legitimately published and available takes precedence, other names for the same taxon become synonyms. Alternatives ranked according to value and/or effectiveness.  

Earlier.  

(Plural primordia) a part or organ in its earliest, almost undeveloped, condition. Primordia, first recognizable stage in the differentiation and development of a particular organ or structure. The first accumulation of cells in an embryo that constitutes the beginning of a future tissue, organ, or part.  

The first season’s shoot of a biennial woody stem [unusual term, used more in horticulture].  

(Adjective) first, in order of development or sequence; (Noun) (plural primaries) first-order branch; (Of vegetation) original, before human interference. Happening first, and leading to something else. Most important. Referring to a condition which comes first and is followed by another. A term denoting a disease or disorder that originates in a specific organ or tissue.…

Said of books or plant names published before 1 May 1753, when Linnaeus’ Species Plantarum is considered to have been published.  

Clasping, grasping. Adapted for grasping or holding, especially by encircling an object.