3. To attack; to infringe; to encroach on; to violate; as, the king invaded the rights of the people.
4. To grow or spread over; to affect injuriously and progressively; as, gangrene invades healthy tissue.
Syn. — To attack; assail; encroach upon. See Attack.
Invade
(In*vade"), v. i. To make an invasion. Brougham.
Invader
(In*vad"er) n. One who invades; an assailant; an encroacher; an intruder.
Invaginate
(In*vag"i*nate) v. t. To insert as in a sheath; to produce intussusception in.
Invaginate
(In*vag"i*nate In*vag"i*na`ted) a. (Biol.) (a) Sheathed. (b) Having one portion of a hollow
organ drawn back within another portion.
Invagination
(In*vag`i*na"tion) n. [L. pref. in- + vagina sheath.]
1. (Biol.) The condition of an invaginated organ or part.
2. (Biol.) One of the methods by which the various germinal layers of the ovum are differentiated.
In embolic invagination, one half of the blastosphere is pushed in towards the other half, producing an
embryonic form known as a gastrula. — In epibolic invagination, a phenomenon in the development of
some invertebrate ova, the epiblast appears to grow over or around the hypoblast.
Invalescence
(In`va*les"cence) n. [L. invalescens, p. pr. of invalescere to become strong. See 1st In-
, and Convalesce.] Strength; health. [Obs.]
Invaletudinary
(In*val`e*tu"di*na*ry) a. Wanting health; valetudinary. [R.]
Invalid
(In*val"id) a. [Pref. in- not + valid: cf. F. invalide, L. invalidus infirm, weak. Cf. Invalid infirm.]
1. Of no force, weight, or cogency; not valid; weak.
2. (Law) Having no force, effect, or efficacy; void; null; as, an invalid contract or agreement.
Invalid
(In"va*lid) n. [F. invalide, n. & a., L. invalidus, a. See Invalid null.] A person who is weak
and infirm; one who is disabled for active service; especially, one in chronic ill health.
Invalid
(In"va*lid) a. [See Invalid, n.] Not well; feeble; infirm; sickly; as, he had an invalid daughter.
Invalid
(In"va*lid), v. t.
1. To make or render invalid or infirm. "Invalided, bent, and almost blind." Dickens.
2. To classify or enroll as an invalid.
Peace coming, he was invalided on half pay.
Carlyle. Invalidate
(In*val"i*date) v. t. [imp. & p. p. Invalidated ; p. pr. & vb. n. Invalidating.] [From Invalid
null.] To render invalid; to weaken or lessen the force of; to destroy the authority of; to render of no force
or effect; to overthrow; as, to invalidate an agreement or argument.
Invalidation
(In*val`i*da"tion) n. The act of inavlidating, or the state of being invalidated.
So many invalidations of their right.
Burke.
