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Meaning: a prefix used to make words with a sense opposite to that of the root word; in this case, meaning "without" or "-less". This is usually used to describe organisms without a certain characteristic, as well as organisms in which that characteristic may not be immediately obvious.
In the English language, many animals have different names depending on whether they are male, female, young, domesticated, or in groups. The best-known source of many English words used for collective groupings of animals is The Book of Saint Albans , an essay on hunting published in 1486 and attributed to Juliana Berners . [ 1 ]
There are, for example, numerous terms describing the complex structural makeup of feathers (e.g., barbules, rachides and vanes); types of feathers (e.g., filoplume, pennaceous and plumulaceous feathers); and their growth and loss (e.g., colour morph, nuptial plumage and pterylosis). There are thousands of terms that are unique to the study of ...
One of the four nucleobases in the nucleic acid of RNA that are represented by the letters A, G, C and U. urea An organic compound with chemical formula CO(NH2)2. urine A liquid byproduct of metabolism in humans and in many animals. uterus A major female hormone-responsive secondary sex organ of the reproductive system in humans and most other ...
A mechanism of sex determination that depends upon the ratio of the number of X chromosomes (X) to the number of sets of autosomes (A). Males develop when the X/A ratio is 0.5 or less, females when it is 1.0 or more, and an intersex develops when it is between 0.5 and 1.0. [8] genic selection
Related: 101 Animals That Start With 'S' for Your Next Trivia Night. 11. Xantic Sargo. Found in the waters of the eastern Pacific Ocean, these ‘X’ named creatures are vibrant fish. Their ...
Sometimes a genus name or specific descriptor is simply the Latin or Greek name for the animal (e.g. Canis is Latin for dog). These words may not be included in the table below if they only occur for one or two taxa. Instead, the words listed below are the common adjectives and other modifiers that repeatedly occur in the scientific names of ...
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