…(forming nouns) denoting a person or thing performing the action of a verb, or denoting another agent…
…a room in a hospital specially equipped for surgical operations…
…a circuit that gives an output signal if there is a signal on any of its inputs…
…used to suggest a possibility that is still more serious or unpleasant than one already considered, but that the speaker does not wish or need to specify…
…added as a general reference to other things similar to the thing mentioned…
…(of a person’s attitude or a situation) showing or requiring a determination not to compromise or be deterred…
…a Boolean operator working on two variables that has the value of one if one but not both of the variables has a value of one…
…indicating the opposite of or a contrast to something stated…
…added as a reference to an unspecified alternative similar to the thing mentioned…
…to within —— (used to express the degree or accuracy of a figure)…
…be the factor that decides whether (something) will succeed or fail…
…denoting or referring to a particular but unspecified one out of a set of items…
…a children’s custom of calling at houses at Halloween with the threat of pranks if they are not given a small gift (often used as a greeting by children doing this)…
…a gamble to decide whether a loss or debt should be doubled or canceled…
…the instinctive physiological response to a threatening situation, which readies one either to resist forcibly or to run away…
