SUB- 



313 



sue- 



substantia nigra, a semilunar layer 

 of grey cells of the mid-brain 

 (anat.}. 



substantive variation, changes in 

 the actual constitution or substance 

 of the parts ; cf. meristic variation 

 (biol.). 



substernal (substeYnal) a. [L. sub, 

 under ; sternum, breastbone.] Below 

 the sternum (zool.~). 



substratose (substra'tos) a. [L. sub, 

 under ; stratum, a layer.] Slightly 

 or indistinctly stratified. 



substratum (substra'tum) n. [L. sub, 

 under ; stratum, a layer.] The 

 base to which a stationary animal 

 or a plant is fixed (biol.\ 



subtectal (subtotal) a. [L. sub, 

 under ; tectum, roof.] Pert, the 

 alisphenoid of a fish skull (zool.). 



subtegminal (subtgg'mlnal) a. [L. 

 sub, under ; tegmen, a covering.] 

 Under the tegmen or inner coat 

 of a seed (&?/.). 



subtentacular canals, two prolonga- 

 tions of the echinoderm coelom 

 (zool\ 



subthoracic (sub'thoras'Ik) a. [L. 

 sub, under ; Gk. thorax, breast.] 

 Not so far forward as to be called 

 thoracic ; appl. certain fish - fins 

 (zool.). 



subtrapezoidal (sub'trapezoid'al) a. 

 [L. sub, under ; Gk. frapezion, a 

 small table ; eidos, resemblance.] 

 Somewhat trapezoid-shaped. 



subtruncate (subtrung'kat) a. [L. 

 sub, under ; truncatus, maimed.] 

 Terminating rather abruptly, as if 

 cut off (biol.\ 



subtypical (subtip'Ikal) a. [L. sub, 

 under ; typus, image.] Deviating 

 slightly from type. 



subulate (su'bulat) a. [L. subula, an 

 awl.] Awl-shaped ; appl. leaves, 

 very narrow and tapering from the 

 base to a fine point (bot.). 



subumbellate (subum'bglat) a. [L. 

 sub, under ; umbella, a small shade.] 

 Tending to an umbellate arrange- 

 ment, with peduncles arising from 

 a common centre (bot.}. 



subumbonal (sub'umbo'nal) a. [L. 

 sub, under ; umbo, boss.] Beneath 

 or anterior to the umbo of a bivalve 

 shell (zool\ 



subumbrella (sub'umbreTa) . [L. 



sub, under ; umbra, shade.] The 

 concave inner surface of the medu- 

 soid bell (zool.\ 



subuncinate (subun'sinat) a. [L. sub, 

 under ; uncus, hook.] Having a 

 somewhat hooked process ; some- 

 what hook-shaped. 



subungual (subung'gwai) a. [L. sub, 

 under ; unguis, a nail.] Under a 

 nail, claw, or hoof (zool.). 



subunguis (subung'gwis) n. [L sub, 

 under ; unguis, a nail.] The ventral 

 scale of a claw. 



subvaginal (subvaj'Inal) a. [L. sub, 

 under ; vagina, a sheath.] Within 

 or under a sheath. 



subvertebral (subveYtebral) a. [L. 

 sub, under ; vertebra, a joint.] 

 Under the spinal column. 



subzonal (subzo'nal) a. [L. sub, 

 under ; zona, a belt.] Appl. a 

 layer of cells immediately internal 

 to the zona radiata (emb.}. 



subzygomatic (subzl'gomat'Ik) a. [L. 

 sub, under ; Gk. zygon, a yoke.] 

 Under the cheek-bone. 



succiferous (sukslf'grus) a. [L. succus, 

 sap \ferre, to carry.] Sap-conveying 

 (bot.). 



succise (suksls') a. [L. succisus, 

 lopped off.] Abrupt ; appearing 

 as if a part were cut off (bot.\ 



succubous (suk'ubus) a. [L. sub, 

 under ; cubare, to lie down.] With 

 each leaf covering part of that 

 under it (hot.}. 



succulent (suk'ulgnt) a. [L. succus, 

 sap.] With tissues full of juice or 

 sap (bot.). 



succus (suk'us) n. [L. succus, juice, 

 sap.] The juice of a plant ; fluid 

 secreted by certain glands (biol.). 



sucker (suk'er) n. [A.S. sucan, to 

 suck.] A stem-branch, first sub- 

 terranean and then aerial, which 

 may ultimately form an independent 

 plant (bot.} ; an organ adapted for 

 creating a vacuum, in some animals 

 for purposes of ingestion, in others 

 to assist in locomotion (zool.). 



sucking - disc, a disc assisting in 

 attachment, at the end of an 

 echinoderm tube-foot (zool.\ 



suctorial (sukto'rfal) a. [L. sugere, 

 to suck.] Adapted for sucking ; 

 furnished with suckers ; appl. a pad 

 of fat in relation with the buccin- 



