Transitional cell see chromophile

translocation n. [L. trans-, across; locus, place] The shift of a segment of a chromosome to another chromosome, not changing the total number of genes present.

translucent a. [L. trans-, across; lucere, to shine] Allowing the passage of light, but not necessarily transparent; semitransparent.

transmission n. [L. trans-, across; mittere, to send] 1. Horizontal: the transfer of an infectious agent from one organism to another. 2. Vertical: transmission from one generation to another.

transposed hinge condition (MOLL: Bivalvia) A condition of teeth usually found in the hinge of one valve being found on the opposite one.

transscutal suture (ARTHRO: Insecta) 1. In many orders, a transverse suture connecting the lateral margins behind the anterior notal wing process, dividing the scutum into an anterior and posterior region. 2. In some Hymenoptera, a suture dividing the posterior part of the scutum into two posterolateral areas called the axillae.

transstadial a. [L. trans-, across; stadium, stage] The retention of microorganisms from one stage of the host to the next; may be part or all of the host's life cycle.

transtilla n.; pl. -lae [L. trans-, across; stilla, drop] (ARTHRO: Insecta) In Lepidoptera, a transverse bar, or variously shaped process, connecting dorso-proximal angles of the male valva; part of the fultura superior; the anterior end of the dorsal extension of the 9th sternum or the vinculum.

transverse a. [L. trans-, across; vertere, to turn] Crossing at right angles to the longitudinal axis; lying across or between.

transverse band of crochets (ARTHRO: Insecta) In larva, crochets being arranged transversely or across the longitudinal axis of the body in a single uniserial or multiserial band, or in two such bands.

transverse costal vein (ARTHRO: Insecta) A wing cross vein in the costal cell.

transverse cubital vein (ARTHRO: Insecta) A transverse wing vein connecting the marginal and cubital veins.

transverse fission A form of asexual reproduction by division of an organism at right angles to the long axis. see binary fission.

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