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covert listening device (orig. US) defect in software (orig. in a machine) (orig. US) an enthusiast of something (orig. US) (v.) to apply a covert listening device (orig. US) (v.) to annoy (colloquial) any of various insects *(nontechnical usage) an important person ("a big bug"); also, someone crazy (as in "firebug", a pyromaniac)*
Also, covert feathers; tectrices – singular: tectrix. A layer of non-flight feathers overlaying and protecting the quills of flight feathers. At least one layer of covert feathers appear both above and beneath the flight feathers of the wings as well as above and below the rectrices of the tail. [116] These feathers may vary widely in size.
In linguistics, a feature of a word or phrase is said to be covert if there is no surface evidence of its existence within that word or phrase. For example, many languages have covert grammatical gender in nouns, in that there is no way to tell from the form of a noun which gender it is; gender only becomes apparent in, for example, articles and adjectival agreement, which depend on gender.
Related to covert operations. 4. The words in this category precede a common three-letter noun (hint: the noun typically refers to a medium-sized rodent).
The primary feathers were asymmetrical to varying degrees, and especially so in the outermost primaries. It is unclear whether the upper arm carried tertiaries. Covert feathers are preserved covering the upper part of the wing feathers in some specimens, and some specimens have preserved the contour feathers of the body. [9]
A covert operation or undercover operation is a military or police operation involving a covert agent or troops acting under an assumed cover to conceal the identity ...
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A covert feather or tectrix on a bird is one of a set of feathers, called coverts (or tectrices), which cover other feathers. The coverts help to smooth airflow over the wings and tail. The coverts help to smooth airflow over the wings and tail.