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Bearing two kinds of heads or capitula; -- said of certain composite plants.

A division of Lepidoptera, including the moths, and hawk moths, which have the antennæ variable in form.

Having the vertebral column evidently continued into the upper lobe of the tail, which is usually longer than the lower one, as in sharks.

Unequal development of the tail lobes of fishes; the possession of a heterocercal tail.

Having the central florets of a flower head of a different color from those of the circumference.

In evolution, a deviation from the typical sequence in the formation of organs or parts.

A word which is irregular or anomalous either in declension or conjugation, or which deviates from ordinary forms of inflection in words of a like kind; especially, a noun which is irregular in declension.

Deviating from ordinary forms or rules; irregular; anomalous; abnormal.

Heteroclitic. [Obs.]

A cell larger than the others, and of different appearance, occurring in certain algæ related to nostoc.

Heterodactylous. -- n.

A group of birds including the trogons.

Having the first and second toes turned backward, as in the trogons.

Having the teeth differentiated into incisors, canines, and molars, as in man; -- opposed to homodont.

Contrary to, or differing from, some acknowledged standard, as the Bible, the creed of a church, the decree of a council, and the like; not orthodox; heretical; -- said of opinions, doctrines, books, etc., esp. upon theological subjects. Raw and indigested, heterodox, preaching. Strype.

Not orthodox. Howell.

An opinion or doctrine, or a system of doctrines, contrary to some established standard of faith, as the Scriptures, the creed or standards of a church, etc.; heresy. Bp. Bull.

Moving in opposite directions; -- said of a lever, pulley, etc., in which the resistance and the actuating force are on opposite sides of the fulcrum or axis.

Passing through the different stages in its life history on an alternation of hosts, as the common wheat-rust fungus (Puccinia graminis), and certain other parasitic fungi; -- contrasted with autocious. -- Het`er*o"cism (#), n.

The condition of having two or more kinds of flowers which differ in regard to stamens and pistils, as in the aster.