efix, = two.

Diaphanous: semi-transparent; clear.

Diaphragm: any thin dividing membrane; that thin membrane
separating the cavity containing the heart from the rest of the body.

Diarthrosis: any articulation that permits of motion.

Diastole: that regular expansion of the heart that draws the blood
inward: see systole.

Dichaetae: a group of brachycerous Diptera with a proboscis
consisting of two parts: Muscids, etc.

Dichoptic: Diptera; eyes separated by front: not contiguous: see
holoptic.

Dichotomous: forked: dividing by pairs.

Dichromatism: the possession of two color varieties.

Dictyoptera: an ordinal term applied to the roaches: also more
generally, to the Orthoptera. {Scanner's comment: Roaches are now
classed as Dictyoptera, and Orthoptera are now classed as distinct
from Dictyoptera}

Didactyle -us: two-toed: with two tarsi of equal length.

Didymus: double: geminate.

Difformis: irregular in form or outline: not comparable; anomalous.
Diffracted: bending in different directions.

Diffuse: spreading out; without distinct edge or margin.

Digestive tract: the alimentary canal as a whole: more specifically that
portion behind the crop, in which assimilation takes place.

Digitate: finger-like, or divided into finger-like processes.

Digitiform: formed, shaped like or having the function of a finger.

Digitules: appendages on the feet of Coccidae; in Lecanium, four
knobbed hairs.

Digitus: the terminal joint of the tarsus, bearing the claws: a small
appendage attached to the lacinia of the maxilla; rarely present and
probably tactile.

Digoneutism: the power to produce two broods in one season.

Dilatatus: Coleoptera a margin, when the sharp marginal edge
extends beyond its usual limit: the base when the transverse diameter
is much longer at one part.

Dilated: widened, expanded.

Dilation: an expansion or widening.

Dilute: thinned out: applied to color means weak or pale.

Dilution: much thinned out or diluted.

Dimera: forms with two-jointed tarsi: specifically applied to some
groups of Homoptera.

Dimerous: having only two tarsal joints.

Dimidiate -us: halved; extending half way around; applied to elytra
when they cover only half the abdomen.

Dimidius: of half length.

Dimorphic: occurring in two well-marked forms.

Dimorphism: a difference in form, color, etc, between individuals of
the same species, characterizing two distinct types: may be seasonal,
sexual o