Col·lat·er·al a.
 1. Coming from, being on, or directed toward, the side; as, collateral pressure. “Collateral light.”
 2. Acting in an indirect way.
 If by direct or by collateral hand
 They find us touched, we will our kingdom give . . .
 To you in satisfaction.   --Shak.
 3. Related to, but not strictly a part of, the main thing or matter under consideration; hence, subordinate; not chief or principal; as, collateral interest; collateral issues.
    That he [Attebury] was altogether in the wrong on the main question, and on all the collateral questions springing out of it, . . . is true.   --Macaulay.
 4. Tending toward the same conclusion or result as something else; additional; as, collateral evidence.
 Yet the attempt may give
 Collateral interest to this homely tale.   --Wordsworth.
 5. Genealogy Descending from the same stock or ancestor, but not in the same line or branch or one from the other; -- opposed to lineal.
 Note: ☞ Lineal descendants proceed one from another in a direct line; collateral relations spring from a common ancestor, but from different branches of that common stirps or stock. Thus the children of brothers are collateral relations, having different fathers, but a common grandfather.
 Collateral assurance, that which is made, over and above the deed itself.
 Collateral circulation Med. & Physiol., circulation established through indirect or subordinate branches when the supply through the main vessel is obstructed.
 Collateral issue. Law (a) An issue taken upon a matter aside from the merits of the case. (b) An issue raised by a criminal convict who pleads any matter allowed by law in bar of execution, as pardon, diversity of person, etc. (c) A point raised, on cross-examination, aside from the issue fixed by the pleadings, as to which the answer of the witness, when given, cannot subsequently be contradicted by the party asking the question.
 Collateral security, security for the performance of covenants, or the payment of money, besides the principal security.
 collateral damage, Mil. damage caused by a military operation, such as a bombing, to objects or persons not themselves the intended target of the attack.
 Is·sue n.
 1. The act of passing or flowing out; a moving out from any inclosed place; egress; as, the issue of water from a pipe, of blood from a wound, of air from a bellows, of people from a house.
 2. The act of sending out, or causing to go forth; delivery; issuance; as, the issue of an order from a commanding officer; the issue of money from a treasury.
 3. That which passes, flows, or is sent out; the whole quantity sent forth or emitted at one time; as, an issue of bank notes; the daily issue of a newspaper.
 4. Progeny; a child or children; offspring. In law, sometimes, in a general sense, all persons descended from a common ancestor; all lineal descendants.
 If the king
 Should without issue die.   --Shak.
 5. Produce of the earth, or profits of land, tenements, or other property; as, A conveyed to B all his right for a term of years, with all the issues, rents, and profits.
 6. A discharge of flux, as of blood.
 7. Med. An artificial ulcer, usually made in the fleshy part of the arm or leg, to produce the secretion and discharge of pus for the relief of some affected part.
 8. The final outcome or result; upshot; conclusion; event; hence, contest; test; trial.
 Come forth to view
 The issue of the exploit.   --Shak.
    While it is hot, I 'll put it to the issue.   --Shak.
 9. A point in debate or controversy on which the parties take affirmative and negative positions; a presentation of alternatives between which to choose or decide; a point of contention; a matter in controversy.
 10. Law In pleading, a single material point of law or fact depending in the suit, which, being affirmed on the one side and denied on the other, is presented for determination. See General issue, under General, and Feigned issue, under Feigned.
 At issue, in controversy; disputed; opposing or contesting; hence, at variance; disagreeing; inconsistent.
 As much at issue with the summer day
 As if you brought a candle out of doors.   --Mrs. Browning.
 -- Bank of issue, Collateral issue, etc. See under Bank, Collateral, etc.
 Issue pea, a pea, or a similar round body, used to maintain irritation in a wound, and promote the secretion and discharge of pus.
 To join issue, or To take issue, to take opposing sides in a matter in controversy.