SEC- 
secondary meristem or cambiu 
Lepage new tissue on both idee 
n woody di Fandom (d02.). 
Saamndate meristem, — phellogen 
(607.). 
secondary prothallium, —a tissue 
produced in the megaspore of 
Selaginella after the true pro- 
thallium is formed (402). 
secondary root: 
primary root, 
tissue, and in turn giving — to 
tertiary roots; roots ari Ee 
other than normal points oe Sight 
(04). 
ondary s —a small o 
eae spore 5 jan ete (bot) 
condary — tis med 
acough Pm Matha externally ea 
and internally phelloderm (04). 
ondary wood,— Sores from 
cambium (doz. 
secretin (sékré'tin) #. [L. secernere, 
os iin) 7. vs) secernere, 
to separate.] A substance or flui 
which is separated from the blood 
or other cells ; 9% process of such 
ae ee (phy 
(sekrétish’d Ss) a. 
iS, 
. secernere, 
Performing the office 
of Sede ‘ — 
sectile (sék’ iL. secare, to cut.] 
ut into “sal partitions, com- 
partments (do4. 
sectorial (s sto a a. [L. secare, 
to cut.] rmed or adapted for 
cutting, as coe eeth. 
d (sék’tind) a. [L. secundus, 
(ppl. flowers or ce 
Peer hia on one side of the stem 
secundifio: rous (stkiind'ifl ee a 
ienadan. to following 
Having flow _— datys one re of. oe 
a! 
stem only (do¢. 
9 (sek indin) n, [L. secundus. 
following.] The second coat of 
ot ps lying wither the primine 
286 
SEG- 
sec —the = aie membranes 
collectively (a A me 
secundly (sé Kind adv. {L. 
Se- 
poor following.] On one side 
of a stem or axis (07. 
sedentary (séd’éntari) a. Per sedere, 
to sit. Not free- ees appl. 
a attached wed base to 
ome substratum (zoo om 
deat (séd) ~ [A.S. ee seed.] A 
mature fruit containing an embryo 
ready for germination under suit- 
ped conditions (d04); semen 
(an 
seed bud,—an ue (bot). 
pent esta, a thin mem- 
Sine crceesinie the seed (b02.). 
seed plant,—a seed-bearing plant 
(402.). 
seed stalk,—the funicle (do/.). 
el,—a structure containing 
bot. 
t,—t 
m 
or of a ed appendage (zoo/.) ; 
a division of a leaf if cleft nearly to 
the base (d04.). 
segmental (ségmén’tal) a. [L. s 
a part.] Of 
mentum, : the mature 
of a segment ; pert. a ent 
segment arteries, — diverticula 
from the dorsal aortae arising in 
the 2g soot between successive 
somites (em 
segmental ease —an embryonic duct 
which gives rise to Wolffian or 
Miillerian duct (em 
egmen n, — an _ ae 
excretory ice -_ 
segmental papilla conspicuous 
igment spots rom which true seg- 
ments may be recognised in Leeches 
zool.). 
segmentation (ség’ménta’shiin) 7%. 
L. segmentum, a segment.] The 
division or ay ek ting into segments 
or portions (47o/.) ; cleavage of an 
ovum 
segmentat: avity,—the ee 
or central pens formed at an 
stage of egg cleavage (em#.). 
segmentation nucleus, — the body 
formed by the union of male and 
female pronuclei in the course of 
fertilization of an ovum (evzé.). 
