1. (a.) Less important than another; of second place, origin, rank; not primary; subordinate\; not of the first order or rate.

2. (a.) Acting by deputation or delegated authority; as, the work of secondary hands.

3. (a.) Possessing some quality, or having been subject to some operation (as substitution), in the second degree; as, a secondary salt, a secondary amine, etc. Cf. primary.

4. (a.) Subsequent in origin; -- said of minerals produced by alteration or deposition subsequent to the formation of the original rocks mass; also of characters of minerals (as secondary cleavage, etc.) developed by pressure or other causes.

5. (a.) Pertaining to the second joint of the wing of a bird.

6. (a.) Dependent or consequent upon another disease; as, Bright's disease is often secondary to scarlet fever. (b) Occurring in the second stage of a disease; as, the secondary symptoms of syphilis.

7. (n.) One who occupies a subordinate, inferior, or auxiliary place; a delegate deputy; one who is second or next to the chief officer; as, the secondary, or under sheriff of the city of London.

8. (n.) A secondary circle.

9. (n.) A satellite.

10. (n.) A secondary quill.

Janus-like Maxwell triangle Munsell scale accessory accident accidental addendum addition additional adjunct adscititious adventitious advocate agent alter ego alternate alternative ambidextrous amicus curiae analogy ancillary appendage appurtenance appurtenant ascititious assistant attorney auxiliary backup backup man bifacial bifold biform bilateral binary binate biparous bivalent borrowed casual champion change changeling chromatic circle chromatic spectrum chromaticity diagram circumstantial cog collateral color circle color cycle color index color mixture curve color solid color spectrum color system color triangle coming common commonality commonalty comparison complementary color conduplicate consequent contingency contingent copied copy counterfeit covert creature demeaning demitint dependent deputy derivational derivative derived dinky disadvantaged disomatous double double-faced dual dummy duple duplex duplicate employee equal equivalent ersatz eventual exchange executive officer exponent extra fake feather feathers figurehead fill-in final flunky follower fortuitous full color fundamental colors geminate geminated ghost ghostwriter hackle half tint halftone happenstance helper hoi polloi hue cycle humble imitated imitation in the shade incidental indirect inessential inferior infra dig insignificant junior last less lesser lieutenant lightweight locum locum tenens low low-priority lower lower class lower orders lowly mail makeshift marginal masses mere chance metamer metaphor metonymy minor mock modest monochrome next best thing no great shakes nonessential not-self of no account of no consequence of no matter of no significance ordinary other paranymph pawn personnel phony pinch pinch hitter pleader plumage poor relation primary primary color procurator provisional proxy pure color relief replacement representative reserve reserves resultant right-hand man ringer scrub second second fiddle second in command second rank second string secondary color secondhand servant servile sign small small-fry small-time solar spectrum spare spares spectral color spectrum spectrum color speculum stand-in stopgap sub subaltern subject subordinate subsequent subservient subsidiary substituent substitute substitution succedaneum superadded superaddition superfluous superseder supervenient supplanter supplement supplemental supplementary supporting supportive surrogate symbol synecdoche temporary tentative tertiary tertiary color third rank third string third stringer token tributary twin twinned two-faced two-level two-ply two-sided two-story twofold