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Radioisotopes.
It is specifically called 'fear of failure'. It can also be termed in general as 'performance anxiety'.
Vestigial structures
A stationary object used to gauge the movement of another object might be called the reference. This could also be termed as the point of reference.
No. Cable internet is only found in what are termed "developed nations" as it is very expensive to set up and most "less developed" nations do not have the infrastructure in place yet to cope with the demand for the interweb.
Such would be termed an incestuous relationship, and may be specifically referred to as an Oedipal relationship (after the Greek myth of Oedipus).
A Uniform Recourse Locator, informally termed a web address. It is a reference to a web source that specifies its location on a computer network and a mechanism for retrieving it
While the question seems a bit unclear, in reference to electricle pathways: an extra pathway in the heart is termed an "accessory" pathway.
Marsupials.Marsupial young, termed joeys, have very undeveloped young after a short gestation period. The joeys then continue to develop for several months in the mother's pouch, or marsupium.
Other than the smell of the dirty feet...no. Offal is a word that refers to trash, specifically used to feed farm animals. Nope...feet ain't it.
He wasn't... at least not in his lifetime. He was known as Edward of Woodstock. The first reference to him being termed 'The Black Prince' occured in the late sixteenth century, this was either a reference to his noted 'black armour' or his temperament, which was noticably volatile.
Daybreak is sometimes termed 'dawn'.