The A to Z of Anatomical Histological and Medical terms
Deoxyribonucleic acid (dee-ohk’-see-ry-bo-nyoo-KLAY-ik AH-sihd)
A
(DNA) a nucleic acid in the shape of a double helix that contains the
B
genetic information necessary for protein synthesis.
depress: Lt. de = prefix implying descent, and pressum = C
pressed, hence to press down
depression = downward movement or a concavity on a surface.
D
Depressor (DEE-press-ohr) muscle which pushes down (≠ levator)
E
dermatome: Gk. derma = skin, tome = a cutting or division, a
segment of skin supplied by a single spinal ganglion.
F
derm- skin
G
Dermis (DER-mis) the layer of the skin lying deep to the epidermis
and composed of dense irregular CT.
H
dermis: Gk. = skin, adj.- dermal.
Descending colon (dee-SEN-ding KO-lun) the segment of the large
I
intestine b/n the transverse colon & the sigmoid colon. (= Left colon). J
detrusor: Lt. detrusio = thrust away.
desmo- ligament
K
deuter- secondary, second
L
di- two, twice, double, reversal, separation, apart from
dia- through across, between, apart, complete
M
diaphragm: Gk. dia = across, and phragma = wall, hence, a
N
partition, adj-diaphragmatic (see phrenic).
Diaphysis (di-AH-fih-sihs) the shaft of a long bone.
O
diaphysis: Gk. dia = apart, and physis = growth, hence the body
of a long bone b/n the growing regions near the ends.
P
diastole: Gk. dia = apart, and stellein = sending, hence sending Q
the walls of the heart apart, i.e. relaxation or dilatation. adj.-
diastolic.
R
diencephalon: Gk. dia = between, & enkephalos = brain, in
S
general the structures surrounding the 3rd ventricle.
adj.- diencephalic.
T
digastric: adj.Gk. dia = double, & gaster = belly, hence, 2-bellied
U
(as in muscles).
digit: Lt. digitus = a finger or toe, usually excepting the pollex
V
(thumb) or hallux (big toe), adj.- digital.
diplo- double, twin
W
diplopia: Gk. diploos = double, and opsis = vision, hence double X
vision.
diploë: Gk. = fold, the cancellous bone b/n the inner and outer
Y
tables of the skull, adj.- diploic.
Z
© A. L. Neill 86
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